Справочник Пользователя для CALAMP WIRELESS NETWORKS INC. BDD4T881-3
120 20180-100a Preliminary
Paragon
PD+
Technical Manual
33
5.2.2 Receiver module (T885-xx-0200, T855-xx-0250 & T835-xx-0200)
Note 1: Refer to Figure 27 (T885), Figure 29 (T855) and to Figure 31 (T835) for locating tuning
controls.
Note 2: When the synthesizer is unlocked, the front panel green LED called "Supply" will flash
indicating that it needs re-tuning.
Warning,
The LED will also flash when the unit is in setup mode while connected to the PGM800win
program.
program.
5.2.2.1 Initial Setup
This initial setup will be used during all receiver alignment procedures described below:
1.
Remove the receiver (T885, T855 or T835) module from the Paragon
PD+
rack frame
2.
Remove the receiver top cover (nearest the handle).
3.
Connect the Paragon
PD+
Extender Rail Kit for Series II to the empty chassis receiver slot.
4.
Prepare the Multimeter to DC Volts.
5.
Apply power to the Paragon
PD+
.
5.2.2.2 Synthesizer Alignment
Single channel: Connect the Multimeter to either side of L504 (T885) or the long lead of L1 (T855
and T835) in the VCO (this measures the synthesizer loop voltage).
1.
T885 (800/900 MHz) Tune VCO trimmer CV500 for a synthesizer loop voltage of 10VDC.
2.
T855 (UHF) Tune VCO trimmer C6 for a synthesizer loop voltage of 10V DC.
3.
T835 (VHF). Tune VCO trimmer CV1 for a synthesizer loop voltage of 9VDC.
Multiple channels (adjusting as shown for single channel above):
1.
T885 (800/900 MHz) Adjust the VCO loop to 10V using the middle frequency channel.
2.
T855 (UHF) Adjust the VCO loop to 10V using the middle frequency channel.
3.
T835 (VHF) Adjust the VCO loop to 9V using the middle frequency channel.
4.
All channels should lie within the upper and lower limits of respectively
All channels should lie within the upper and lower limits of 16V and 3V respectively for
the T885 and T855 or within 13V and 5V for the T835.
the T885 and T855 or within 13V and 5V for the T835.