Communication Network Interface CNI-903M Radio Packet Modem User Manual Users

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Document ID	94680
Application ID	LrhNd7Tx4Vq9qIIiGa7f/A==
Document Description	Users
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	43.77kB (547121 bits)
Date Submitted	2000-04-05 00:00:00
Date Available	2000-07-14 00:00:00
Creation Date	2000-03-23 13:34:34
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Document Lastmod	2000-03-23 13:35:14
Document Title	Users
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CN I-903M Devebper‘s Guide
User Guide to
CNI—903 M
(Radio Packet Modem)
CNI Inc.
CNI-903M Developer’s Guide
1. Overview
2. Specification andfeamres
A.Environment
B. General RF specifications
C.Radia intetface
MWWW
D. Transmitter
EReceiuer
3. Circuit guide
4. Installation Guide
Modem Description
c‘mfiww
Design Consideration
Installation
9.
Warning Label
9.
Antenna Syecificaqfion
CNl-QOSM Developer's Guide
1. Overview
CNI-QOSM, RPM(Radio Packet Modem). is a digital data communication equipment
in accordance with Mobitex spemfication. The frequency it uses ranges from 896Mhz
to 90 thz for tmnsrnission and from 93 SMHz to 941MHz for reception.
This modern enables you to make data communication in two-way, and it also helps
you to enjoy various types of data services with full mobility due to suppon for
roaming.
With ‘lnierface Connector’ you can apply this modem to many kinds of machines to
use ‘Mobitex Asynchronous
Serial Communic anon (MASC)‘
protocol for
communication. And it enables you to monitor the operation during communication.
0 Basm specification
- Dimension
- Weight
- Supply voltage
» RF protocol
- Host protocol
: 58 x47x9mm
: 35 g
: 4.2V
: Mobitex
: MASC
2. Specification and features
A. Environment
- Operation temperature: -25 “C ~ +55 °C
- Storage temperature
» Humidity
condensed
B. GeneralRFspetifications
:-35°C ~+SO'C
: normal operation aficr 8 hours storage in 95% non-
- Modulation : GMSK
- Mode : half-duflex
- Bin-ate . 8,000bps
C. Radio interface
— Channel spacing 1 12.5KHZ
— Bandwidth 1 IOKHZ
D. Transmitter
— Frequency : 896~901MH2
CNl-903M Devefloper’s Guida
36§RV<42 0‘ 125Wi2dB (21 dBm)
425RV<50 003WfldB(15dBm)
{_—_
- Frequency stabllity ‘ 11.5p'pm
- Modulatlon stabdity : iS‘Vn
Transrmt power (MAX Power : ZW')
Rnammg Value
dBuV (RV)
W(dBm)
Output-Power
RVGO
3 DSRV<36
FM denauon
2.00Wt2dB(3ldBm)
0 .5Wi2dB (27dBm)
: 2.0KHzt0,1KHz (chw ‘1‘)
-2.0KHz flHKHz (Logic ‘0’)
Harmnmc and Spunous Emission
Outpm Power in carrier off
Spurious RF Radlation Camcr Off
: S -56dBc(Portable)
SSOdBdMobile)
: 025 p.W(-3 6dBm)
S -60dBm (896 ~ 901MHZ band)
5 —80dBrn (935 —~ 941MHz band)
E. Receiver
— Frequency : 935 - 941MHZ
- Sensnivity : 5415 (“3111 ( SSdB
- Out-of—Band Rejection (fo il [0 lOMHz) 1 > GOdBc
- Image frequency rEJection : > 45st
CNl-QOfiM Developer‘s Guide
3. Circuit guide
A. RF circuit
CNl-903M circuit consists of five parts, each of which is power supply, antenna,
synthesis/modulation offrequency, transmission and reception
(1) Power supply
Power supply is composed ofvoltage regulator and switching part. Voltage regulator
generates JV of power supplied from VBB when the control of RFiEN switch is
tinned on
When RF_EN is high. RP_VCC is regulated with SV, and RF_VCC is supplied to
PLL lC, VCTCXO, OP-AmpflCl 02), VCO, and Drive Amp(Ql04).
When RX_EN is low‘ RX_VCC is turned on by QZOZ, and RX_VCC (3V) is
supplied to LNA, MIXER IF AMP and [F [C
When TXiEN is low, TX_VCC is turned on by QZOl, and TX_VCC (3V) is
supplied to Buffer Amp(Ql 05) and OPAAmpthIO—t).
The switch between TX mode and RX mode can be achieved by central of
RX_EN(Q202) and TX_EN(Q201).
® Antenna
Antenna part is composed of antenna matching circuit. BPF, and RX/TX signal
isolation circuit
CNI-903M adapts li J'4 WHIP antenna to match in mid range frequency of
Corrn'mmication.
“PX/RX signal isolatmn circuit isolates signals of wmmunication and is composed
with switching diode and inductor.
The signals received from antenna meet the send/receive path and then D101 is
turned on and the signals proceed only to receiving path. In receivmg mode, signals
from TX Power Amp can not go through RX path because DlDl is off. (refer to RF
Cfl'Cull diagram)
Efii'
CNI-903M Developer’s Guide
(33 Frequency synthaizer and modulator
Frequency synthesizer consists of PLL part, VCO module and pre-modulaticn filter.
The PLL part is composed of phase detector, loop filter. and 12.6Mhz VCTCXO
VCO module generates 896~901Mhz frequencies in accordance with the voltage
which is from charge pump of PLL to loop filter. Programmable Divider in PLL
makes the VCO output frequency to any channel value according to the frequency
data from Logic CPU. Phase detector gets low and high frequencies from
comparison of phase. Loop filter filters the frequencies to get a value of Voltage.
The voltage is input to VCO to achieve phase lock process.
Modulalion is completed when modern 1C signal of Logic pan is input to VCO and
authorized,
G) Receiver
Receiver filters and amplifies RF signal through SAW filter and LNA.
RX part is double super heterodyne type: and consists of LNA, LPF, Mixer, SAW
filter and H3 [C part There happens RX signal from antenna and the signal is low-
noise—amplification(LNA} through SAW filter and LNA\ and it comes to 2nd H?
455KHZ via 2nd X-TAL(39.545M'HZ).
SAW filter rejects Image frequency(RX iZ'lF) generated from l’st Mixer while
receiwng. For example. if the input channel is 939MHz, the output frequency would
be 40MHz from mixer while local frequency is S99M'Hz. But if SAW filter will not
filter the image frequency of SQ912‘H’, S/N would be worse with 40Ml-[2(899-
859=40) of noise, And SAW filter should filter to prevent local frequency becoming
spurious through LNA and reverse path,
LNA amplifies and sends the faint signal From antenna to mixer, and mixer TR mixes
and generates lst IF with frequency from antenna.
IF comes from mixer, And [F contains intebmodularion product component. MCF
removes that product component. So clean IF(40MHZ) can be inserted to [F 1C. 2nd
local frequency entered [F IC is mixed with the [F(40MHZ) signal to be 2nd [F of
671?
CNl-903M Developer's Guide
45 SKHz Simultaneously.
2nd IF signal of 45514112 passes LPF(CeTam1c filer) to remove the noise, and the
signal is tie—modulated Wllh discriminator method. Here detected RF signal entered
mto receiver and R551 signal which indicates the strength, and they are passed to
micro processor in analogue value.
® Transmitter
Transmitter consists of driver amp and power amplifier, and TX power control. It
generates carrier frequency while share RX with frequency synthesizer,
Local frequency is used to direct transmission frequency because there is difference
between transmission and reception. So it only amplifies and propagates through
PA(Power Amp.) which can get high level of gain easily with low power.
B. LOGIC Circuit
CD Summary
This unit consists of CPU part, Decoder part modem part, and power supply part.
® CPU pin-ram)
The CPU adopted by this unit has 16/32-hit AKMTTDMI RISC processor
(GGMHZ) and works on 4MHz. The main functions are as follows;
- Execute MASC protocol
— Control PLL circuit of“ pan and perform Power Saving function
- Perform Data transaction function( receiving and transmitting) through Data
Pump(Modem)pai1
- Checking and processing of RSSI Level come from RF part
- Perfon'n Data transaction with DTE through DTE interface part
(3) Memory part (ICI, IC3)
Memory part consists of FLASH Memory (ZMb, lCl) and SRAMUMh, ICS),
Flash Memory stores LLI information and program. And SRAM supplies
memory stacks for program.
CNl-QOEM Developer's Guide
(D Decoder Part (ICG)
Decoder decodes control signal of CPU and generaies SRAM memory choosing
signal,
(9 Modem Data Pump (lC7)
Modem pan is m charge of MASC protocol , and transmns two way Data
between CPU and RF part The mam functions are as followings ;
- Packet Data Framing
- GMSK Data Modulanon
- FEC Encodinga’Dewdmg
— Interleavnge-interleavfirg
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GNl-903M Developer’s Guide
2. Pin Assignmerfls of (INTI-9031“
This unit can be easily imegrated into anywhere othe wireless modem adopted device.
PlN ASSIGNMENTS
l. RESET
eww
9=.w
TXD
PWRON
RXD
SENSE]
RTS
SENSEZ
8. CTS
94
BOTTOM VlEW
ecc
CCC‘
SENSES
10.
11‘
12.
13.
. DCD
. lNRANE
16, R1
. LOWBATT
. 4.2‘V' FWR
19.
29.
DTR
SEN SPA
DSR
MAGWA IT
GND
4.2V PWR
: External Res/cl
‘ Transmit Data
: RPM Power On/OH
2 Receive Data
1 Status Input 1
: Request to Send
1 Status Input 2
I Clear to Send
1 Status Input 3
: Data Transmit Ready
2 Status Input 4
: Data Set Ready
1 Message Wait
1 Data Carrier Detecl
: In Range Indicator
2 Ring Indicator
2 Low Battery
1 4121} Power Supply
i Ground 10 Host
: 4 EV Power Supply
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CNI-QDSM Developer’s Guide
3. Power Supply
Example Df Power Supply from out-source : inpul Voltage is 442V115%, current is
about 2M],
mgom' 3 5X6
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CNI-903M Developer's Guide
I Design Considerations
To integrate a wireless modem, there are several issues that need to be addressed and
considered Internal connections and placement are critical to a successful implementation. A
successful design requires attention to several support mechanisms as following:
A DC Power
- Serial interface and control
- Mechanical mounting
- Software
- Antenna
- RF control
I. PmdnctionApplieations
The DEM wireless modem is well suited for mobile and fixed applications. The wireless
modem enables user to sendireceive data anytime anywhere, and can provide
communications for a Wide variety of products
1.1 Portable Terminal Use
Portable designs produce good environment for an integrated modem, The portable
terminal is typically battery powered. subject to temperature extremes, and designed to
be physically strong When desiyiing portable device. user needs to pay attention to
the following issue:
- DC power noise levels on the host interface
— Minimum operating voltage levels
- Device internal ambient temperature
- Antenna gain and proximity to user
- Mechanical design for drop, vibration, dust, salt and liquid spill.
Note : Regarding this last point, CNl—903M modem is designed on the assumption that the host
device will control these conditions
1.2 Fixed Mount Usage
Fixed-mount usage eliminates most oftlie mechanical constraints of handheld designs.
The core requirement applies, but fixed usage does not present any special conditions
to address.
CNl-903M Developer‘s Guide
l Installation
Installing CNl-903M modem is very simple as follows
- Place the modem 10 connector on product housing‘ and apply a little fame to
push it down to be connected.
Caution : Care not to bend or damage the connector pins.
- Use four #2-56 UNC 2A machine screws to tie up the modem as the figure
shown below
- Connect modem connection cable to a small hole provided at the rear of the
modem.
, Connect the modem connection cable to Antenna
an
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‘ \ noun rm was Stuntman)
1. Mounting
Proper mounting ofthe modern requires a combination of securely fastening it within the
product housing as well as adequately grounding the modem case to the hausing.
1.1 Fastening
Mount the modem to the rigid OEM product housing by using four “2-56 UNC 2A
machine screws as the figure shown below.
1.2 Grounding
For CNi-903D modem, the pin number l‘J of connector on the modem is ground
pint So if user properly places the modem, ground is automatically done
“‘ Er?
CNI-BOSM Developer’s Guide
l Warning Label
Following warning label shall be attached on the devices using CNI»903M modem.
While this device is in operation, a separation distance cf at least 20 centimeters
(7i87 inches) is maintained between radiating antenna and the body of the user
or nearby persons in order to meet the FCC RF exposure guidelines.
‘5 Efil’
CNl—903M Developer's Guide
I Antenna Specification
Product Name : Whip Antenna of 900MHz Range
MODEL : HA-QOU-SSMA
Manufacturer : HanKouk Antenna Company
(D Application
This specification describes H4 WHIP ANTENNA used for frequency range of
QOOMI—Iz for transmission DATA of Wireless.
® Conditions oi using Antenna
I Handheld I Fixed I Mobile I Outdoor I Indoor D Others
® Shape of Antenna
Refer to attached drawing No.
CD Electrical features and Performance
Item Features/Performance Remark
,_=_=__—.—==——————==—=————i
Frequency range 896 ~ 941 MHZ
Nominal impedance 50 Q
V.S.WR ] :20 1
Radiation Omni-directiun
Polarization Vertical
Gain Unity
® SlrncluralSperificatinn
Item Spec i fieation/‘Features Remark
Radiator 01,5 Speedo wire
Sleeve Shrinkable Tube F—Type 01.5
‘ Connector SMA-Plug Ni»plaring
Total length l 85 1 3mm
16
CNI-QOSM Developer’s Guide
@ Other features and performance
A‘ Temperature
Anbexma shall not be deformed or damaged and shalt satisfy “Clause 4" in [his
specificanon after Placing Antenna at 40°C and 70 VC far 96 hours.
B. Humidity
Afler placing Antennfl at surrounding lamp. 40°C with relative humidity of 90 - 95 for
96 hours, antenna shall not be deformed or damaged, and shall satisfy “Clause 4” in this
specifi cation
‘7 Em
CNI—903M Developer’s Guide
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4 § . ; g a .
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< Picture] >
Stimulus CHI MEN Stimulus ‘ CH] MEN
[MHz] [dB] [MHz] [dB]
894.000 L 32.322 931.000 -2].178
896.000 22.71 934.000 49.697
899.000 r 23.158 936.000 -18.528 4
901.000 -23.608 939.000 -17.647
904.000 -23.9S] 941.000 46.942
906.000 —24.393 944.000 -16.216
909.000 -24.983 946.000 45.56
911.000 46191 949.000 44.903
914.000 -28.439 951.000 44.273
916,000 ‘ -32.236 954.000 43.759
919,000 -36.85 956.000 43.303
921.000 1 —33.206 959.000 42.973
924.000 48.902 961.000 -12.718
928.000 25.681 964.000 42.636
929.000 -23.126 966.000 1 -12.401
‘8 am?
CN1-903M Developer’s Guide
Ch 1 NEW
511m _ 1 f REF 1 _ ._... 1
1" 1 1 i 1 | r 1535’166 555.1142}
1..._1__.J 1 1 |
5 1 1 1 “1‘ 1"! 1 1 ‘ 1 1
1 | | 1 | 1 | 1 |
1— ,....._~,_ __
1 1 1 1 1 1 1 . T 1
1 1
L“.,_.. _ 43”, ——~-,<->.> ._L____. “4 ,
1 1 1 “1 1 1 1 1 1 1 1
1 1 1 .
1 1 fr 1 -1 "“‘T“‘) i —1 w" T‘ —1
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1\ 1 1 1 1 1 f 1 1 /‘
1—3e1-—— ----1<———--~——---1~ ~,__._. -~ - 1 » » 179 1-1
3 1\ 1 1 1 | 1 1 X 1
i 1 \ i f l 1 1 1 /1 1
1 | \1 1 1 1 1 1 / 1 1
l 1 1 1 1 1 1 1 / 1 1
1 x 1 1 . J/ 1
1—1m- - 741—9
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L 1 ' 1 1 J
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< Picture2 >
Stimulus 1 CH] MEN [dB] Stimulus [MHz] CHI MEN
[MHz] [dB]
894.000 1.1658 931.000 1.1919
896.000 1.1579 934.000 1.231
899.000 1.1494 936.000 1.2688
901.000 1.1413 939.000 1.3018
904.000 11349 941.000 1.3315
906.000 1.1283 944.000 13657
909.000 1.1134 946.000 14001
911.000 1.1331 949.000 1.4386
914.000 10737 951.000 1.4792
916.000 10501 954.000 15162
919.000 LO298 956.000 1.5516 1
921.000 10447 959.000 1.5793
924.000 10744 961.000 1.6017
928.000 11099 964.000 1.6182
929.000 1.16 966.000 1.631
ErTl’
CNI-903M Developer’s Guide
61—41 l‘lEfl 1 U rs ¢ 59 $25 11 1 4645 1 254)
camw 519.139»; wan W: reau «£219,995; 131.59} M.
< Picture 3 >
Stimulus 1 CH 1 CH 1 Stimulus ‘ CH] CH 1 _1
[MHz] MEN MEN xL [ MHz 1 MEN MEN xL
R [Q] [0] R10] [91
894.000 50.727 76973 931.000 44.422 6.0938
1 896.000 51.014 7.3359 934.000 r 44.288 7.9629
899.000 51.324 6.93 36 936.000 44.541 9.8516
901.000 51.551 6.5312 939.000 45.236 11.643
904.000 51.783 6.1953 941.000 46.184 13.26
906.000 52.045 5.8164 944.000 47.193 14.941
909.000 52.516 5.207 946.000 48.588 16.607
911.000 52.674 4.2658 949.000 50.299 18.336
914.000 52.416 30273 951.000 52.605 20.037
916.000 51.477 ; 1.9902 954.000 55.584 21.381
919.000 50.026 1.4643 956.000 59.186 ' 22.271
921.000 ‘ 48.972 1.6152 959.000 63.238 22.281
924.000 47 242 2.138? 961.000 67.991 21 .43
928.000 ‘ 48.064 3.097"! 964.000 71.57 19.496
‘ 929.000 46.029 4.4043 966.000 75.488 16.547
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Modify Date                     : 2000:03:23 13:35:14-06:00
Create Date                     : 2000:03:23 13:34:34-06:00
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