5-4

Alignment
ÌKey the transmitter and adjust “MAX Dev (Nar-
row)“ for maximum deviation of 2.2 kHz ± 0.2 kHz
as indicated on the deviation meter.
CTCSS Modulation Level
ÌSelect the “low” power output level.
ÌSelect the band center frequency channel (CH7),
with 151.4 Hz CTCSS encode, and reduce the AF
generator injection to zero.
ÌKey the transmitter and adjust “CTCSS Dev (wide)“
for CTCSS deviation of 0.75 kHz ± 0.1 kHz as in-
dicated on the deviation meter.
ÌSelect the band center frequency channel (CH9),
with 151.4 Hz CTCSS encode, and reduce the AF
generator injection to zero.
ÌKey the transmitter and adjust “CTCSS Dev (Nar-
row)“ for CTCSS deviation of 0.35 kHz ± 0.1 kHz
as indicated on the deviation meter.
DCS Modulation Level
ÌSelect the “low” power output level.
ÌSelect the band center frequency channel (CH8),
with 023 DCS code, and reduce the AF generator
injection to zero.
ÌKey the transmitter and adjust “DCS Dev (wide)“
for DCS deviation of 0.75 kHz ± 0.1 kHz as indi-
cated on the deviation meter.
ÌSelect the band center frequency channel (CH10),
with 023 DCS code, and reduce the AF generator
injection to zero.
ÌKey the transmitter and adjust “DCS Dev (Nar-
row)“ for CTCSS deviation of 0.35 kHz ± 0.1 kHz
as indicated on the deviation meter.

Receiver

The sensitivity parameters can be adjusted from
the computer by utilizing the Alignment Software.
Refer to the onboard help of the Alignment Software
Manual for details.
ÌSet up the test equipment as shown for receiver
alignment, and install the audio test adapter.
ÌWith the transceiver set to the band center fre-
quency channel (CH2), and with the RF signal
generator tuned to the same frequency, set the
generator for ±3.0 kHz deviation with 1 kHz tone
modulation, and set the output level for –5.0 dBµ
at the antenna jack.
ÌAdjust “Rx TUNE“ the receiver front-end tuning
for optimum SINAD, reducing signal generator
output level as necessary for proper meter de-
flection.
ÌAfter the previous step, the final signal genera-
tor level should be less than –5.0 dBµ for 12dB
SINAD.
50-Ohm
Dummy Load
RF Signal
Generator
Power Supply
13.8V DC
AF Generator
SINAD
Meter
AF Test
Adapter
AC Volt
Meter
Inline
Wattmeter
Deviation
Meter
RF Sampling
Coupler
CT-71
Connection
Cable
Frequency
Counter
Transceiver
13.6