Cobra Electronics FRS100 User Manual 63853
Cobra Electronics Corporation 63853
8
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| Document ID | 63853 |
| Application ID | dDYKDb3p2wFCWB49Nihljw== |
| Document Description | 8 |
| Short Term Confidential | No |
| Permanent Confidential | No |
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| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 35.13kB (439162 bits) |
| Date Submitted | 1999-10-14 00:00:00 |
| Date Available | 1998-05-28 00:00:00 |
| Creation Date | 2001-05-22 10:21:21 |
| Producing Software | Acrobat Distiller 4.0 for Windows |
| Document Lastmod | 2001-05-22 10:21:37 |
| Document Title | 63853.pdf |
| Document Author: | VicodinES /CB /TNN |
FCC ID: BBOFRSLOO
APPENDIX 5
USERS MANUAL
USER INSTRUCTIONS FOLLOW THIS SHEET
USERS MANUAL
FCC ID: BBOFRSIOO
APPENDIX 5
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FCC ID: BBOFRSlDU
APPENDIX 6
TRANSMITTER ALIGNMENT
ONE (1) PAGE ALIGNMENT PROCEDURE FOLLOWS THIS SHEET
TRANSMITTER TUNE‘UP PROCEDURE
FCC ID: BBOFRSIOU
APPENDIX 6
7.
Alignment instructions
WARNING
An) repairs oi adjustments should be made under the supervision Ufa
qualified radio—telephone tcchnician
TRANSMITTER
1.
Power Supply Voltage
The Power supply voltage should be set for 60 VDC measured at the radio
during transmit. PE‘i‘lOdiCull) check the power supply voltage during the alignment procedure
Frequency Setting
Connect a frequency counter or Communications Service Monitor to the
antenna connector through an RF pmtcr attenuator (5 Matt minimum rating,
20 (113 minimum attenuationi.
Depress the P’I‘T s\\itcl’\i
v Adjust the TCXO-l trimmer capacitor such that the output frcquenc) is
equal to the channel frequency with a maximum error of + - 200 Hz
Release thc‘ l’ switch.
Output Power Alignment.
. Set the power supply voltage for 6.0 \'DC
Connect a Communications Service Monitor or a watt meter and dummy load
to the antenna connector.
Depress the PTT switchv
, To be convinced for 05 WatttBO ohm load] output pouer with a maximum
error of - 0.15 Watts.
Release the FIT switch,
Devmtion Adjustment,
. Connect an audio generator
The audio frequency should be set at l KHZY
Connect an FM deviation meter or Communications Service Monitor to the
antenna connector through an RF power attenuator LS watt minimum rating.
20 dB minimum attenuation). Set the monitor to read peak deviation.
Depress the PT’I" s\ tch.
Adjust R\'3 for * ~ .3Kl1z maximum deviation
Release the PTI‘ s“ itch.
FCC ID: BBOFRSIOO
APPENDIX 7
CIRCUITS AND DEVICES T0 STABILIZE FREQUENCY
SYNTHESIZER
A phase locked loop (PLL) circuit establishes and stabilizes
operating frequency.
The data for producing necessary frequencies is established
by the CPU on the digital board.
The frequency stability of the Tx/Rx is maintained by the
TCXO, which generates a stable frequency of 12.8 MHz.
CIRCUITS AND DEVICES T0
STABILIZE FREQUENCY
FCC ID: BBOFRSlOO
APPENDIX 7
FCC ID: BBOFRSlOO
APPENDIX 8
CIRCUITS TO SUPPRESS SPURIOUS RADIATION
AND LIMIT MODULATION
Cigcuigrz gg Sggpxgss spugiggs Emi§§ion§
output from the final RF power amplifier, Q501, and present-
ed to a low—pass filter configured in a “pi“ network consisting
of L25, C311, L26, 012, C313, L27, C315, C316 and R306.
w F' t r
Microphone signal is amplified limited to prevent deviation
over 2.5 kHz, and applied to a 3 kHz low—pass filter configured
around ICE.
CIRCUITS TO SUPPRESS SPURIOUS
RADIATION AND LIMIT MODULATION
FCC ID: BBOFRSlOO
APPENDIX 8
w555\cobfrsloo
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