R.V.R. Elettronica PTRL-NV/2/HP/S3, Техническое руководство

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 31
PTRLNV/2/S3 and PTRL-NV/2/HP/S3 - Technical and Maintenance Manual
UP button pressed: 1799.90 1800.00 1750.00 1750.10
DOWN button pressed: 1750.10 1750.00 1800.00 1799.99
After the PLL has been locked for about 90 seconds, the display
turns off automatically.
To switch it on, press the ENTER button.
7) Having verified that the transmitter has locked into the desired
operating frequency by checking that the UNLOCK led is off, set the
switch so as to remove the short-circuit from between the two
conductors of the REMOTE cable. The R.F. power output is now enabled
and should measure about 2W for the 2W version (1W for the 1W version
and 5W for the 5W version).
To make this measurement, ensure that the PWR ADJ led is on by setting
the meter switch (13 Fig.1) to the corresponding position and then
take the reading from the 50W FDS scale on the meter.
8) Leaving the power output at 2W for the 2W version (1W for the 1W
version and 5W for the 5W version), select a new operating frequency
well away from the current one.
E.g. 1755.0MHz press ENTER: when the UNLOCK led comes on, the power
output level should fall to zero and return to its previous level
only when the led goes out again (locked to new frequency).
9) Now short-circuit the REMOTE input and the power level should
immediately fall to zero.
Removing the short should result in the power output returning
gradually to its previous level.
10) Deviation meter check.
Set the modulation bar-graph display gain (4 Fig.1) to 100%.
Connect a low-distortion audio frequency generator to the MONO input
(10 Fig.2) or STEREO inputs (10-11 Fig.2).
Inject a 400Hz tone at a level of -10 dBm for the european version
or 0dBm (775mV RSM = 2.2V peak to peak) for the american version.
Check that the bar-graph diaplay (3 Fig.1) lights upto the first
red led, indicating 100% deviation.
With the DOT/BAR switch (1 Fig.1) in the BAR position, all the green
leds and first red led will be on; in the DOT position only the first
red led will be on.
Now disconnect the audio generator and ensure that all the bar-graph
leds go out (3 Fig.1).
Set the control (4 Fig.1) to 10% and inject a 400Hz tone of -30dBm
(-20 dBm for the american version) and repeat the proceeding
operation. The procedure should be followed first for the MONO input
and then for the STEREO input.