Olson Technology LP-OR-304 User Manual

LPOR-304 Operating Instructions Revision A

LPOR-304

Dual Redundant Return

Band Receiver

Operating Manual

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LPOR-304 Operating Instructions Revision A

Contents

DESCRIPTION ........................................................................................... 3

Front Panel .............................................................................................3

Figure 1 – LPOR-304 Front Panel ................................................................. 3

Rear Panel ..............................................................................................3

Figure 2 – LPOR-304 Rear Panel .................................................................. 3

Internal Adjustments................................................................................4

Figure 3 – Jumper Access Points .................................................................4

Control Board Layout................................................................................4

Figure 4 – Control Board Layout.................................................................. 4

Fuse.......................................................................................................5

Optical Input Chart...................................................................................5

Table 1 – Optical Input Chart.....................................................................5

LPOR-304 OPERATION OVERVIEW............................................................ 6

INSTALLATION ......................................................................................... 6

Table 2 – DIP Switch Settings .....................................................................6

OPTICAL BEHAVIOR .................................................................................7

Table 3 – Optical Thresholds......................................................................7

Function Switch .......................................................................................7

INDEPENDENT MODE DETAILED OPERATION............................................ 8

Rx1 and Rx2 LEDs (Independent)...............................................................8

Table 4 – Independent Rx1 and Rx2 LED Conditions ..........................................8

Mode LED (Independent) ..........................................................................8

REDUNDANT MODE DETAILED OPERATION ............................................... 8

Rx1 and Rx2 LEDs (Redundant) .................................................................8

Table 5 – Redundant Rx1 and Rx2 LED Conditions............................................. 8

Mode LED (Redundant).............................................................................8

Table 6 – Redundant Rx Mode LED Conditions .................................................8

OPTICAL POWER TEST POINTS ................................................................. 9

TEST POINT SELECT SWITCH .................................................................... 9

Table 7 – Test Point Select Switch Settings ....................................................9

I2C DISABLE LINES................................................................................... 9

SUMMARY ALARM RELAY .......................................................................... 9

Figure 5 – Microprocessor Block Diagram ..................................................... 10

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LPOR-304 Operating Instructions Revision A

DESCRIPTION

The LP-OR-304 has dual, redundant return band receivers in a single module. The receivers have an
extended bandwidth of 300 MHz to allow the use of spectrum multiplication. Individual receivers in the

module can be disabled.

Front Panel

The two rectangular red/green status LEDs monitor the receivers’ optical
inputs. They are normally green and change to red on a low or missing optical
input. Any red LED causes a module alar m and a chassis summary alarm. The
two DC test points monitor the receivers’ optical inputs. One (1) mW ( 0 dBm)
is 1 V at the test point. Only high impedance meters should be used. Use the
ground test point at the bottom of the module, not chassis ground.

The two multi-turn potentiometers set the receivers’ gains. Setting any gain
control fully counter-clockwise will disable that receiver. A disabled receiver
will never generate an alarm.

The -20dB RF test point monitors the RF output of any single receiver. It
does not require termination.

The two position toggle switch selects which receiver’s output appears at
the test point. Ensure that this switch is in the correct position before using the
test point to set the RF gain.

The ground test point should be used when checking optical input levels.

The SC/APC optical input connectors are on the right of the front panel,
with optional FC/APC connectors available.

Rear Panel

The RF output connectors are on the rear of the unit. Receiver #1 is on the
top. Receiver #2 is on the bottom.

Figure 1 – LPOR-304

Front Panel

Figure 2 – LPOR-30 4 Rear Panel

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