Holland Electronics NE 1000 - Manual (Page 6)

NE1000 CATV Optical Transmitter Operation and Maintenance Guide
FRONT PANEL
A diagram of the NE1000 is shown in Figure 1. The NE1000 features are
described below.
1. AC POWER LED - Lights up when the transmitter is receiving AC power.
2. LASER POWER LED - Lights up when the laser is switched on.
3. LASER ON/OFF KEY SWITCH – Turns on/off the power to the laser.
4. POWER LED - Illuminates when the output power of the LASER is outside the
range of maximum or minimum acceptable power.
5. TEMP LED - Lights up when the laser temperature is abnormal.
6. BIAS LED – Illuminates when the biasing current of the LASER is abnormal.
7. HIGH LED - Lights up when the power of the input RF signal is above normal.
8. NORMAL LED - Illuminates when the power of the input RF signal is normal.
9. LOW LED - Lights up when the power of the input RF signal is below normal.
10. MGC (Manual Gain Control) Adjustment – For manually setting the
transmitter gain when the transmitter is in MGC mode.
11. AGC (Automatic Gain Control) Adjustment – For setting the output power of
the transmitter when the transmitter is in AGC mode.
12. RF MONITOR -20dB – 75
Ω F-type connector test port for measuring input
signal level at 20 dB
±1.5 dB lower than the actual signal.
REAR PANEL
1. ON/OFF Switch – Used to turn transmitter on or off.
2. POWER JACK – For supplying power to the transmitter.
3. FUSE – A 250V 3.15A fuse to protect the transmitter against short circuits and
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