Return Optical Transmitter:
Optical power: 0.5mW--3mw
Monitoring point of optical power: 1V/1mW
Return driving power: 80dB??V
Power loss: 6W
Return System Parameter
C/N ?? 46dB
IM2 ?? -61dB
IM3 ?? -56dB(receiver power at -12dBm)
Forward Optical Receiver
Optical power ?? -6dBm alarm (the light is red)
Monitoring point of optical power: 2V/1mW
0dBm receiving: Output about 86dB??V
CNR: 45.5dB(receive at -6dBm, 59 PAL-D RF)
Flatness: +0.75dB
Reflection: 47--550MHz ?? 16dB; 550--862MHz ?? 14dB
Power loss: 7 w

RF Parameter (forward channel)
Workstation model       HOS8604-M      HOS8604-M
Frequency range  MHz    47(85)--750    47(85)--862
Nominal gain    dB      ??32           ??32
Nominal output level  dBuV    109/112/106    109/112/106
Flatness in band    dB    +/-0.75(diplexer)    +/-0.75(diplexer)
Return loss         dB    47(85)--550MHz??16; 550--862MHz??14
C/CTB               dB    68    68
C/CSO               dB    65    65
C/CXM               dB    63    63
Group delay         ns    57.75MHz/62.18MHz ???10(47-862MHz)
112.25MHz/116.68MHz???8(47-862MHz)
HM    dB    ??66
Impactive voltage
10/700us    KV    5
Supply voltage    V    --60V 50Hz OR--220V 50Hz
Power loss    W    69

Note: The above output modules using GaAs makes power double, if using SI output level should be reduced 4DdB.
*47--550MHz: Transition analog signal, 550--862MHz: Data transmission band is 6-10dB lower than analog signal. 109/112/105dB??V
Corresponding to output of (750)862/550/47MHz frequency point.
RF Parameter(Return channel)

Frequency Range     MHz    5--30(65)
Gain       dB    8(c way)    12(a way)    16(b way)
Flatness in band     dB    ??+/-0.75
Return loss          dB    ??16
Noise figure         dB    ??16

*C/CSO               dB    ??55
Group delay    ns    (57MHz/59MHz 5-65MHz)??20
(26MHz/28MHz 5-30MHz)??20
Power loss            W    5

The numerical value at * was measured at
F2-f1=8MHz(f1=15.25MHz; F2=23.25MHz) within 5--30MHz wave band.
F2-f1=17MHz(f1=31.25MHz; F2=48.25MHz) within 5--60MHz wave band.
Output level is 120 dB??V at testing moment.
Users could choice the return gain according to their projects, if the return level ensure the input level that arrives at the equipment more than 70dB, return gain 8dB could be choice, this could ensure input level of return optical transmitter
The testing conditions of optical link system are 59 PAL--D channel, 3.8% modulation index.

1. Optical Parameter
Wavelength 1290--1570nm
Input power -6--+2dBm
Connector FC/APC or SC/APC
Return wave loss >45dB
2. System Parameter
C/N ?? 52dB (-1dBM optical power)
C/CSO ?? 63dB (output is 2dB lower than above)
C/CTB ?? 67dB (output is 2dB lower than above)
3. RF Parameter
Output level: ?? 110dB??V (receiver power at -3dBm)
Bandwidth: 47--750(862) MHz
Flatness in band: +0.75dB
Nominal gain: -24dB
Output impedance: 75??
Reflection loss: 47--550MHz ??16dB 550-862MHz??14dB
Connector: F type (metric system)