Specifications
2. Verify the CNI GETC LED’s indicate the Idle State
(see Table 3), L1 is ON, L2 thru L7 are OFF. (If
Narrow Band repeater, L3 is also ON).
3. Initiate a call from the test radio to the console.
4. Verify that the CNI GETC switches to the
Conventional Call mode and indicators L1 and L6
turn ON (also L3 for Narrow Band repeaters).
This indicates the CNI GETC has decoded the
Channel Guard tone and has sent the Group Call
Assignment message to the CEC/IMC Uplink
GETC
5. Verify that voice can be heard on both radios.
6. Unkey the radio and verify that the CNI GETC
returns to the Idle State.
Multisite Initiated Call
1. Initiate a multisite call or a console call to a radio
assigned to the CNI repeater.
2. When the call is received, verify that CNI GETC
switches to the Trunked Call mode and indicators
L1, L2, and L6 turn ON (also L3 for Narrow Band
repeaters).
This indicates the CNI GETC has received a
Group Channel Request Message with a valid
Group ID.
3. Verify that voice can be heard on the radio.
4. When the call is finished, verify that the CNI
GETC returns to the Idle State.
REPEATER ADJUSTMENTS
The following adjustment information supplements the
basic repeater alignment instructions found in the associated
repeater maintenance or installation manuals. These
procedures should be performed only when the repeater’s
performance is in doubt.
MASTR II and IIe Repeaters
Steps 1 thru 4 are for setting the TX MOD ADJUST in
MASTR IIe repeaters only. For MASTR II repeaters, skip
to step 5.
1. Key the transmitter by grounding DELAYED PTT
(J931-8). Do not apply any audio to the
microphone input so no microphone modulation is
obtained.
2. Connect an Audio Oscillator between TX AUDIO
HI (P8-6) and TX AUDIO LO (P8-5) and adjust
the oscillator for an output level of 1.0 Vrms at
1000 Hz.
3. Set the MOD ADJUST pot on the transmitter
exciter for 3.75 kHz deviation.
4. Unkey the transmitter by removing the ground
from J931-8 and disconnect the Audio Oscillator.
The following steps are applicable to the MASTR II and
MASTR IIe repeaters.
5. Verify the CNI Software 344A3497 is installed
(refer to the GETC FIRMWARE INSTALLATION
section).
6. Verify the jumper wire has been installed between
TP102 and J18-2 on the GETC Logic Board (refer
to Figure 4 in the Logic Board Modification
section).
7. Verify the GETC DIP switches are properly set for
CNI operation (refer to Figure 11 in the DIP
SWITCH SETTING section).
8. Ensure the CNI GETC’s personality Channel
Guard Mapping has one Conventional Network
Channel Guard set for 123.0 Hz. (Refer to the
personality example, Figure 13, in the
Programming The Personality section.)
9. Verify the jumpers are properly installed as shown
in Table 2.
10. Turn ON the Station Power Supply and verify L1
on the GETC is turned ON. This confirms proper
operation of the modem. (For 900 Mhz
applications, both L1 and L3 will be ON.)
11. Apply an “on channel” RF signal, modulated with
a 123.0 Hz tone at 0.75 kHz deviation. Verify that
indicator L6 turns ON. Verify the transmitter
output deviation is 0.75 kHz • 50 Hz. Adjust the
CG ADJUST POT on the receiver/exciter door if
necessary.
12. Modulate the signal with an additional 1000 Hz
tone at 3.0 kHz of deviation. Verify the transmitter
output deviation is 3.75 kHz • 100 Hz. Adjust
POT 2 (TX POT at MASTR IIe Control Shelf) if
necessary.
13. Adjust the POT 1, Remote Audio Level, for 0 dBm
into 600 ohms.
14. Remove the 1000 Hz tone from the signal
generator, but leave Channel Guard (123.0 Hz)
tone ON.
15. Apply a 2175 Hz tone at -30 dBm (25 mV rms) to
TB1201-2,5. Verify that indicator L2 turns ON.
LBI-38986
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