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adjustment value.".
5. Connect the frequency counter probe to TP101, or pin12 of the RF
module, to measure the SYRI signal from the BBIC.
6. The clock frequency should be within 10,368,000Hz ± 10Hz. If not
then enter "SETFREQ nn nn" where nn nn are the clock frequency
adjustment values. An increase in the value will lower the clock
frequency and vice versa. The maximum value is 00 FF.
7. Switch off the 9V supply.
8.4. LOOPBACK TESTS
1. Connect the RF Cable from the CMD60 to the RF 2 line (IC10
pin44) and Ground plane of the base P.C.B. Use the minimum
amount of stripped/exposed cable to solder to the contacts.
2. Switch on the 9V supply.
3. Set the CMD60 to MANUAL TEST mode.
4. Set the CMD60 TRAFFIC CARRIER to 0.
5. Invoke the "TESTMODE" batch file from the PC.
6. Press ACCEPT RFPI and SETUP CONNECT on the CMD60.
7. If connection is successful the CMD60 will display "CONNECTION
ESTABLISHED"
8. Enter "ANT2" to direct the RF output to the "RF 1" terminal
9. Check the power (NTP): it must be between 20 and 25dBm.
10. Press MODULATION.
11. Set DATA TYPE to FIG 31.
12. Check frequency drift: must be 0 ± 35 kHz/ms.
13. Check frequency offset: must be 0 ± 40 kHz.
14. Check deviation or modulation (max ± B field) with data type
"FIG 31": must be 340kHz to 380kHz.
15. Press Menu Up "
16. Press POWER RAMP.
17. Check that the burst fits the mask.
" on the CMD60.
34
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