72
3.
Increase the deviation level until the SINAD
meter display returns to 12 dB.
3
. Within the RF Control zone, adjust the
selected RF level until the SINAD reading on
the SINAD meter averages 12 dB
(instantaneous reading will vary several dB).
Mod Sum: 0.00 kHz
Fixed 1kHz:
Synth: 3.00 kHz
5 kHz
Format Sel:
DPL
Code
021
DTMF: 0.00 kHz
Code: 1234567890#ABCD
External: 0.00 kHz
Increase as
required
~
x
x
x
RF Control:
Preset: - - B/W: NB
GENERATE
Freq:
Output Level:
-115 dB
816.5000 MHz
Mon RF In: RF I/O
Modulation Type:
FM
Meter: SINAD
Output Level: -115.0 dBm
+12.00 dB
0 +30dB
+12dB
4. Note RF output level required for SINAD
reading of 12 dB (-115 dBm typical
dependent on manufacturers specifications).
NOTE
RF output level can be referenced to mV, uV,
dBu, or dBm. Selection of units is available
within the Display Control zone (Output
Level:).
4. Read the deviation level required in step 3.
A typical modulation acceptance bandwidth
of a 5 kHz receiver is 7 to 8 kHz. Refer to
your radio's service manual to determine if
any adjustments are required.
4-2.4 Modulation Acceptance Bandwidth
1. Set the volume control of the radio to 10%
of its rated audio output level.
2. Set the RF output level 6 dB (doubles the
voltage, i.e. 0.35 uV increased 6dB = 0.7
uV) above the RF output level required in
paragraph 4-2.4 to achieve the SINAD
reading of 12 dB.
Mod Sum: 0.00 kHz
Fixed 1kHz:
Synth: 3.00 kHz
7 kHz
Format Sel:
DPL
Code
021
DTMF: 0.00 kHz
Code: 1234567890#ABCD
External: 0.00 kHz
~
x
x
x
RF Control:
Preset: - - B/W: NB
GENERATE
Freq:
Output Level:
-109 dB
816.5000 MHz
Mon RF In: RF I/O
Modulation Type:
FM
Increase 6 dB
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