ROI-S04488
OPERATION
3-23
RX ALM 1 indicator (Only for 1+1 system)
Lights when:
• Receiver input level decreases lower than a preset value from
squelch level at the No. 1 channel ODU,
• APC loop of the local oscillator unlocks at the No. 1 channel ODU,
• IF signal is lost at the No. 1 channel DEM,
• High BER is worse than preset value (1
×
10
−
3
) at the DPU,
• BER is worse than preset value at the No. 1 channel DPU (1
×
10
−
3
, 1
×
10
−
4
, 1
×
10
−
5
or 1
×
10
−
6
selectable),
• Frame synchronization is lost at the No. 1 channel DPU,
• Communication between CPU of No. 1 channel ODU and CPU of
the IDU is lost.
RX ALM 2 indicator (Only for 1+1 system)
Lights when:
• Receiver input level decreases lower than a preset value from
squelch level at the No. 2 channel ODU,
• APC loop of the local oscillator unlocks at the No. 2 channel ODU,
• IF signal is lost at the No. 2 channel DEM,
• High BER is worse than preset value (1
×
10
−
3
) at the No. 2
channel DPU,
• BER is worse than preset value at the No. 2 channel DPU (1
×
10
−
3
, 1
×
10
−
4
, 1
×
10
−
5
or 1
×
10
−
6
selectable),
• Frame synchronization is lost at the No. 2 channel DPU,
• Communication between CPU of No. 2 channel ODU and CPU of
the IDU is lost.
TX OPR 1 indicator (Only for 1+1 system):
Lights when the modulator and transmitter of No. 1 channel are
selected.
Summary of Contents for PASOLINK
Page 1: ...DIGITAL MICROWAVE RADIO SYSTEM PASOLINK Training Course ...
Page 16: ......
Page 17: ...B 1 1 IDU ...
Page 18: ......
Page 68: ...Pasolink Digital microwave radio system Installation guide ...
Page 81: ...NEC PASOLINK installation procedure January 2002 ...