ALIGNMENT AND PERFORMANCE TESTS
4-5
Revised January 2001
Part No. 001-9800-501
4.5 RECEIVER IF ALIGNMENT AND CHECK
1. If required, remove the top cover of the transceiver
to access the RF board. Manually or automatically
select “Receiver IF Alignment”.
2. Connect an RF signal generator to the antenna jack
using a 6 dB or greater pad. Set the generator output
for the displayed frequency, modulated with 1 kHz
at 3 kHz deviation.
3. Connect the DC voltmeter to J201, pin 20 (see
Figure 4-4). Set the generator output level for –47
dBm (1.0 mV) at the antenna jack. and manually
adjust L218 for a meter reading of 2.9 V ±0.1 V.
4. Set the generator output level for –80 dBm (22 µV)
at the antenna jack. Connect a SINAD meter to the
speaker jack on the back of the transceiver and
adjust the volume level to approximately 1/3 of the
maximum level. Click “OK” and manually adjust
L213 and L215 for best SINAD.
5. Manually or automatically select “Receiver Check”.
Follow the instructions to check SINAD sensitivity
on the low, mid, and high channels indicated. Click
the Wide Band/Narrow Band button to switch the
selected bandwidth. Use 3 kHz deviation for wide
band channels and 1.5 kHz deviation for narrow
band channels.
4.6 SQUELCH ADJUSTMENT
1. Connect an RF signal generator to the antenna jack
using a 6 dB or greater pad. Also connect a SINAD
meter to the speaker jack and adjust the volume to
1/3 maximum if required.
2. Manually or automatically select “Squelch”. Set the
signal generator for the indicated frequency and
modulation and adjust the output level for the indi-
cated SINAD level.
3. Follow the instructions on the screen to adjust the
wide and narrow band squelch level.
4.7 RSSI ADJUSTMENT
This adjustment calibrates the RSSI signal level.
Proceed as follows:
1. Manually or automatically select “RSSI”. Connect
an RF signal generator to the antenna jack using a 6
dB or greater pad and set it for the displayed
frequency and output level.
2. Follow the instructions displayed on the screen.
4.8 PERFORMANCE TESTING
Performance testing can be accomplished by
programming temporary conventional channels and
then checking receiver and transmitter operation on
those channels. Channels should be programmed at the
low, mid, and high ends of the operating band.
The PCTune software described in the preceding
information can also be used for basic performance
testing. Transmitter power output can be checked as
described in Section 4.2, and receiver sensitivity can
be checked as described in Section 4.5.
Receiver and transmitter specifications you may
want to check are as follows:
Receiver Specifications
12 dB SINAD Sensitivity - 0.35 µV maximum
Audio Power Output - 5 watts (w/external 4.7-ohm
load)
Audio Distortion - Less than 5%
Transmitter Specifications
RF Power Output:
15-Watt Models - 2-15 watts
30-Watt Models - 10-30 watts
Wideband Deviation:
Voice Only - 3.0 kHz ±100 Hz
Data Only -1000 Hz ±100 Hz
Total Voice and Data - 4.7 kHz maximum
Narrow Band Deviation:
Voice Only - 1.2 kHz ±100 Hz
Data Only - 800 Hz ±100 Hz
Total Voice and Data - 2.3 kHz maximum
