Futurecom Systems Group ULC DVRS700 MOBEXCOM DVR Digital Vehicular Repeater User Manual 8F083X03 Rev 4 14a
Futurecom Systems Group ULC. MOBEXCOM DVR Digital Vehicular Repeater 8F083X03 Rev 4 14a
Contents
- 1. users manual
- 2. USERS MANUAL
- 3. rf exposure booklet
- 4. revised rf exposure booklet
- 5. Updated User Manual
- 6. Updated RF Expo Booklet
- 7. User Manual
- 8. RF Safety Booklet
- 9. Trimmable Antenna
- 10. User Manual Revised
- 11. RF Safety Booklet Revised
- 12. RF Exposure Training and Product Safety Information
- 13. Installation Manual
- 14. Product Safety Information
- 15. Installation Manual for Base Loaded Mobile Antennas
- 16. Installation Manual for Vehicle Roof-Top Antennas
revised rf exposure booklet
Product Safety and RF Energy Exposure Booklet for
Digital Vehicular Repeater Systems (DVRS)
ATTENTION!
Before using this equipment, please read this booklet which contains
important operating instructions for safe usage, RF energy control and
compliance with exposure limits.
8F083X03 Rev. 4.14a
8F083X03 Rev 4.14a
DVRS - Product Safety and RF Energy Exposure Booklet Page 2 of 8
RF Exposure
ATTENTION!
Changes or modifications not expressly approved by Futurecom Systems Group Inc. could void
the User’s authority to operate the equipment.
ATTENTION!
This radio is intended for use in occupational / controlled conditions, where users have full
knowledge of their exposure and can exercise control over their exposure to meet FCC
limits. This radio device is NOT authorized for general population, consumer, or any other
use.
If this vehicular repeater is used in combination with a separate mobile radio transmitter, it is the
responsibility of the Repeater Operator to ensure that Maximum Permissible Exposure (MPE)
limits are observed at all times during repeater transmissions. The Repeater operator must ensure
at all times that no person comes within the MPE distance from the vehicle body to ensure
compliance with the FCC’s RF energy exposure limits for the general population.
The minimum lateral distance between all possible personnel and the body of the DVRS equipped
vehicle must be as specified in Table 1 (Stand-alone DVR) and Table 2 (DVR interfaced to a
Mobile Radio i.e. DVRS).
Failure to observe the MPE distance exclusion area around the antenna may expose persons
within this area to RF energy above the FCC exposure limit for bystanders (general population).
Stand Alone DVR (20W) Recommended Lateral Distance from Antenna
VHF 82cm (50:50 Tx duty)
UHF 380-512MHz 70cm (50:50 Tx duty)
700MHz 73cm
800MHz 76cm
Table 1 Recommended Lateral Distance - Stand Alone DVR
Mobile Radio Rated Power Recommended Lateral Distance from Vehicle Body
DVRS with <7 Watt Mobile Radio 20 cm
DVRS with 7 to 15 Watt Mobile Radio 30 cm
DVRS with 16 to 39 Watt Mobile Radio 60 cm
DVRS with 40 to 100 Watt Mobile Radio 90 cm
Table 2 Recommended Lateral Distance – DVRS (DVR interfaced to a Mobile Radio)
IMPORTANT
The maximum allowed gain of the λ/4 omni-directional antenna for the Mobexcom P25 DVR
Repeater is Unity (0dBd).
8F083X03 Rev 4.14a
DVRS - Product Safety and RF Energy Exposure Booklet Page 3 of 8
RF Exposure Label
The RF Exposure Label should be affixed in the vehicle beside the mobile radio control head.
The label should be in the direct view of the Repeater operator. The label is supplied with the
Mobexcom P25 DVR Repeater.
FCC Label
including interference that may cause undesired
2) This device must accept any interference received,
1) This device may not cause harmful interference, and
Operation is subject to the following two conditions:
This device complies with Part 15 of the FCC Rules.
operation.
8F083X03 Rev 4.14a
DVRS - Product Safety and RF Energy Exposure Booklet Page 4 of 8
Installation Requirements for Compliance with Radio
Frequency (RF) Energy Exposure Safety Standards
ATTENTION!
To ensure compliance with RF Energy Safety Standards:
Install only Futurecom / Motorola approved antennas and accessories and set conducted
power into the DVR and Mobile antennas equal to or lower then the approved power levels –
refer to Table 3 (Stand Alone DVR) or Table 4 (DVR interfaced to a Mobile Radio i.e. DVRS).
Ensure the antenna installation is consistent with the DVR Antenna Installation instructions
described in this document as well as with the Mobile Radio Antenna Installation Instructions
published in the applicable Motorola Installation Manual.
Ensure the Product & RF Safety Booklets enclosed with the Mobile Radio and the DVR are
available to the end user upon completion of the installation.
ANTENNA STAND ALONE DVR MODEL
# Kit # Freq.
Range
[MHz] Type 700 MHz
(20W) 800 MHz
(20W) 403-430
(20W) 450-470
(20W) 470-512
(20W) VHF (20W)
1 *HAF4016 764-870 ¼ wave 20W 20W
2 HAE6012A 380-433 ¼ wave 20W
3 HAE4003A 450-470 ¼ wave 20W
4 HAE4004 470-512 ¼ wave 20W
5 HAD4006 136-144 ¼ wave 20W
6 HAD4007 144-150.8 ¼ wave 20W
7 HAD4008 150.8-162 ¼ wave 20W
8 HAD4009 162-174 ¼ wave 20W
Table 3 Approved Stand-Alone DVR Combinations
8F083X03 Rev 4.14a
DVRS - Product Safety and RF Energy Exposure Booklet Page 5 of 8
NOTE:
Mobile RF conducted antenna power in the tables below denotes 50:50 Tx duty ratio.
DVR: 7V083X06 (DQPMDVR8000P) Freq Range: 806-825, 851-870MHz, Trunk Mounted Antenna: HAF4016A, 1/4 wave, 0dBd
FCC ID: LO6-DVRS800 Maximum conducted power delivered to antenna: DVR (W) / Mobile (W)
Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted
Mobile Antenna
A
ntenna
A
ntenna
A
ntenna Antenna
A
ntenna
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3806
Max Power: DVR / Mobile 10W / 57W 10W / 57W 10W / 57W
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3808
Max Power: DVR / Mobile 10W / 57W 10W / 57W 10W / 57W
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4870
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4862
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval
XTL5000 UHF R2(470-512MHz)
FCC ID: AZ492FT4867
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval Future approval Future approval
XTL5000 700/800MHz
FCC ID: AZ492FT5823
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAF4013A,
1/4 wave, 3dBd
HAF4014A,
1/4 wave, 3dBd
HAF4016A,
1/4 wave, 0dBd
HAF4017A,
1/4 wave, 3dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE6016A,
1/4 wave, 0dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4012A,
1/4 wave, 3.5dBd
HAE4013A,
1/4 wave, 3.5dBd
HAE4004A,
1/4 wave, 0dBd
Table 4A Approved 800 DVRS Configurations
DVR: 7V083X05 (DQPMDVR7000P) Freq Range: 764-776, 794-806MHz, Trunk Mounted Antenna: HAF4016A, 1/4 wave, 0dBd
FCC ID: LO6-DVRS700 Maximum conducted power delivered to antenna: DVR (W) / Mobile (W)
Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted
Mobile Antenna
A
ntenna
A
ntenna
A
ntenna Antenna
A
ntenna
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3806
Max Power: DVR / Mobile 5W / 57W 5W / 57W 5W / 57W
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3808
Max Power: DVR / Mobile 5W / 57W 5W / 57W 5W / 57W 20W / 120W *
* XTL5000 VHF (136-174MHz)
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4870
Max Power: DVR / Mobile 5W / 120W 5W / 120W 5W / 120W 5W / 120W
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4862
Max Power: DVR / Mobile 5W / 48W 5W / 48W 5W / 48W 5W / 48W
XTL5000 UHF R2(450-512MHz)
FCC ID: AZ492FT4867
Max Power: DVR / Mobile 5W / 54W 5W / 54W 5W / 54W 5W / 54W 5W / 54W 5W / 57W
XTL5000 700/800MHz
FCC ID: AZ492FT5823
Max Power: DVR / Mobile 5W / 42W 5W / 42W 5W / 42W 5W / 42W
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
RAD4010A,
1/2 wave, 3dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4013A,
1/4 wave, 3.5dBd
HAE4004A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE6016A,
1/4 wave, 0dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4012A,
1/4 wave, 3.5dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAF4013A,
1/4 wave, 3dBd
HAF4014A,
1/4 wave, 3dBd
HAF4016A, 1/4
wave, 0dBd
HAF4017A,
1/4 wave, 3dBd
Table 4B Approved 700 DVRS Configurations
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DVRS - Product Safety and RF Energy Exposure Booklet Page 6 of 8
DVR: 7V083X04 (DQPMDVR6000P) Freq Range: 470-512MHz, Trunk Mounted Antenna: HAE4004A, 1/4 wave, 0dBd, HAE6016A, 1/4 wave, 0dBd
FCC ID: LO6-DVRSUHF Maximum conducted power delivered to antenna: DVR (W) / Mobile (W)
Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted
Mobile Antenna
A
ntenna
A
ntenna
A
ntenna Antenna
A
ntenna
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3806
Max Power: DVR / Mobile Future Approval Future Approval Future Approval
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3808
Max Power: DVR / Mobile Future Approval Future Approval Future Approval
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4870
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4862
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval
XTL5000 UHF R2(470-512MHz)
FCC ID: AZ492FT4867
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval Future Approval Future Approval
XTL5000 700/800MHz
FCC ID: AZ492FT5823
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAD4009A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE6016A,
1/4 wave, 0dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4012A,
1/4 wave, 3.5dBd
HAE4013A,
1/4 wave, 3.5dBd
HAE4004A,
1/4 wave, 0dBd
HAF4013A,
1/4 wave, 3dBd
HAF4014A,
1/4 wave, 3dBd
HAF4016A,
1/4 wave, 0dBd
HAF4017A,
1/4 wave, 3dBd
Table 4C Approved 470-512MHz DVRS Configurations
DVR: 7V083X03 (DQPMDVR5000P) Freq Range: 450-470MHz, Trunk Mounted Antenna: HAE4003A, 1/4 wave, 0dBd, HAE6016A, 1/4 wave, 0dBd
FCC ID: LO6-DVRSUHF Maximum conducted power delivered to antenna: DVR (W) / Mobile (W)
Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted
Mobile Antenna
A
ntenna
A
ntenna
A
ntenna Antenna
A
ntenna
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3806
Max Power: DVR / Mobile 10W / 57W 10W / 57W 10W / 57W
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3808
Max Power: DVR / Mobile 10W / 57W 10W / 57W 10W / 57W
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4870
Max Power: DVR / Mobile 10W / 120W 10W / 120W 10W / 120W 10W / 120W
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4862
Max Power: DVR / Mobile 10W / 48W 10W / 48W 10W / 48W 10W / 48W
XTL5000 UHF R2(470-512MHz)
FCC ID: AZ492FT4867
Max Power: DVR / Mobile 10W / 54W 10W / 54W 10W / 54W 10W / 54W 10W / 54W 10W / 54W
XTL5000 700/800MHz
FCC ID: AZ492FT5823
Max Power: DVR / Mobile 10W / 42W 10W / 42W 10W / 42W 10W / 42W
HAF4013A,
1/4 wave, 3dBd
HAF4014A,
1/4 wave, 3dBd
HAF4016A,
1/4 wave, 0dBd
HAF4017A,
1/4 wave, 3dBd
HAE4013A,
1/4 wave, 3.5dBd
HAE4004A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE6016A,
1/4 wave, 0dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4012A,
1/4 wave, 3.5dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
Table 4D Approved 450-470MHz DVRS Configurations
8F083X03 Rev 4.14a
DVRS - Product Safety and RF Energy Exposure Booklet Page 7 of 8
DVR: 7V083X07 (DQPMDVR4000P) Freq Range: 380-430MHz, Trunk Mounted Antenna: HAE6012A, 1/4 wave, 0dBd
FCC ID: LO6-DVRSUHF Maximum conducted power delivered to antenna: DVR (W) / Mobile (W)
Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted
Mobile Antenna
A
ntenna
A
ntenna
A
ntenna Antenna
A
ntenna
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3806
Max Power: DVR / Mobile Future Approval Future Approval Future Approval
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3808
Max Power: DVR / Mobile Future Approval Future Approval Future Approval
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4870
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4862
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval
XTL5000 UHF R2(470-512MHz)
FCC ID: AZ492FT4867
Max Power: DVR / Mobile Future Approval Future Approval Future Approval Future Approval Future Approval Future Approval
XTL5000 700/800MHz
FCC ID: AZ492FT5823
Max Power: DVR / Mobile 10W / 42W 10W / 42W 10W / 42W 10W / 42W
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAD4009A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE6016A,
1/4 wave, 0dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4012A,
1/4 wave, 3.5dBd
HAE4013A,
1/4 wave, 3.5dBd
HAE4004A,
1/4 wave, 0dBd
HAF4013A,
1/4 wave, 3dBd
HAF4014A,
1/4 wave, 3dBd
HAF4016A,
1/4 wave, 0dBd
HAF4017A,
1/4 wave, 3dBd
Table 4E Approved 380-430MHz DVRS Configurations
DVR: 7V083X01 (DQPMDVR3000P) Freq Range: 136-174MHz, Trunk Mounted Antenna: HAD4006A, 1/4 wave, 0dBd, HAD4007A, 1/4 wave, 0dBd,
FCC ID: LO6-DVRSVHF HAD4008A, 1/4 wave, 0dBd, HAD4009A, 1/4 wave, 0dBd
Maximum conducted power delivered to antenna: DVR (W) / Mobile (W)
Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted Roof Mounted
Mobile Antenna
A
ntenna
A
ntenna
A
ntenna Antenna
A
ntenna
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3806
Max Power: DVR / Mobile 6W / 57W 6W / 57W 6W / 57W
XTL5000 VHF (147-174MHz)
FCC ID: AZ492FT3808
Max Power: DVR / Mobile 6W / 57W 6W / 57W 6W / 57W
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4870
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval
XTL5000 UHF R1(380-470MHz)
FCC ID: AZ492FT4862
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval
XTL5000 UHF R2(470-512MHz)
FCC ID: AZ492FT4867
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval Future approval Future approval
XTL5000 700/800MHz
FCC ID: AZ492FT5823
Max Power: DVR / Mobile Future approval Future approval Future approval Future approval
HAF4013A,
1/4 wave, 3dBd
HAF4014A,
1/4 wave, 3dBd
HAF4016A,
1/4 wave, 0dBd
HAF4017A,
1/4 wave, 3dBd
HAE4013A,
1/4 wave, 3.5dBd
HAE4004A,
1/4 wave, 0dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE6016A,
1/4 wave, 0dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE4012A,
1/4 wave, 3.5dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAE6012A,
1/4 wave, 0dBd
HAE6013A,
1/2 wave, 2dBd
HAE4003A,
1/4 wave, 0dBd
HAE4011A,
1/2 wave, 3.5dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
HAD4007A,
1/4 wave, 0dBd
HAD4008A,
1/4 wave, 0dBd
HAD4009A,
1/4 wave, 0dBd
Table 4F Approved 136-174MHz DVRS Configurations
8F083X03 Rev 4.14a
DVRS - Product Safety and RF Energy Exposure Booklet Page 8 of 8
Antenna Installation Instructions
IMPORTANT
To assure optimum performance and compliance with RF Energy Safety standards, these
antenna installation guidelines and instructions are limited to metal-body vehicles with
appropriate ground planes and take into account the potential exposure of back seat
passengers and bystanders outside the vehicle.
Selecting an Antenna Site/Location on a Metal Body Vehicle
External installation
Check the requirements of the antenna supplier and install the vehicle antenna external to a metal
body vehicle in accordance with those requirements.
Roof top
For optimum performance and compliance with RF Energy Safety standards, mount the mobile
radio antenna in the center area of the roof.
Trunk lid
For optimum performance and compliance with RF Energy Safety standards, mount the DVRS
antenna in the center area of the trunk.
Before installing an antenna on the trunk lid:
Ensure that the distance from the antenna location on the trunk lid will be at least 85 cm (33
inches) from the front surface of the rear seat-back to assure compliance with RF Energy
Safety standards.
Ensure that the trunk lid is grounded by connecting grounding straps between the trunk lid and
the vehicle chassis.
Ensure that the antenna cable can be easily routed to the radio. Route the antenna cable as
far away as possible from any vehicle electronic control units and associated wiring.
Check the antenna location for any electrical interference.
Ensure that any other mobile radio antenna on this vehicle is at least 1ft (30.48cm) away from
the DVR and its associated mobile radio antennas.
NOTE:
Any two metal pieces rubbing against each other (such as seat springs, shift levers, trunk and
hood lids, exhaust pipes etc.) in close proximity to the antenna can cause severe receiver
interference.
Mobile Radio / DVR Antenna separation
To ensure interference-free performance when both the Mobile Radio and the DVR are active, the
two antennas must be mounted in such way as to provide 30dB minimum antenna isolation.