CALAMP WIRELESS NETWORKS INC. BDD4T881 Manual De Usuario

General Check out (part2 of 2)

Paragon

PD

 units are set and characterized at the factory to optimize performances.

It is not recommended to try readjusting units unless it is really required.

Misadjusting unit may result in significant performance losses.

°°°°

Set the service monitor to generate on the selected receive frequency. Verify alternately for both receivers.

The carrier should be modulated with a 1.0 kHz tone at deviation level specified below:

8

(Dataradio wide band
measurement
method: no audio
filtering)

- For 

Full 

channel

unit, set deviation
to  ±3 kHz.

- 

For Half channel
unit, set deviation
to ±1.5 kHz

Better than  -110 dBm

(including cable loss)

- Backplane 

cor-

responding to
the receiver
being verified:
SK1, Pin 6 (see
Figure 30)

- Service 

monitor

(IFR) set to
SINAD

- 

IFR IF filter set
to MID position
or 30 kHz wide
filter.

Refer to section 6.2 for Series
I and to section 6.4 for Series
II

9

Receiver distortion
(Dataradio wide band
measurement
method: no audio
filtering)
- Set 

service

monitor RF Gen
output to –70
dBm

- 

≤

 5.5 %

- Backplane 

cor-

responding to
the receiver
being verified:
SK1, Pin 6 (see
Figure 30)

- Service 

monitor

(IFR) set to
SINAD

- 

IFR IF filter set
to MID position
or 30 kHz wide
filter.

Refer to section 6.2 for Series
I and to section 6.4 for Series
II

10

RSSI
- 

Vary the RF level
output from –120
to –80 dBm

- Measure 

voltage

at each RSSI re-
ceiver ouputs

- 

2VDC @ -110dBm

- 10dB/V 

±0.2V

- Backplane 

cor-

responding to
the receiver
being verified:
SK1, Pin 5 (see
Figure 30)

- DC 

Voltmeter

measurement

Refer to section 6.2.2.5 for
Series I and   to sections
6.4.2.5 or 6.4.2.6 for Series II