User Manual
STTRS DOCUMENTATION
Document Number 80-330501HBKM – Issue A - Draft Page 24 of 500
4.2.1.3. Dummy Load (80-007401)
When a combiner system is used to split or combine RF signals, in many cases it is most cost
effective to use a standard stock item 4, 6 or 8 port device where, in fact, only a 3 or 6 port device is
needed. In this case the Four Way Splitters (05-003302) each have two of their ports terminated with
Dummy Load (80-007401) in order to preserve the correct impedance of the devices over the
specified frequency range. This also has the advantage of allowing future expansion capability should
extra channels or other functions become necessary.
Dummy Load (80-007401) Specification
Parameter Specification
Frequency Range 0 to 1000MHz
Power Rating 1.6 Watts
0-500MHz 1.2:1 VSWR
(Max)
500-1000MHz 1.3:1
Temperature -20 to +55°C
Connector ‘N’ type Male
Nominal Impedance 50 Ohms
4.2.2. F/O Link Subsystem (98-800001)
F/O Link Subsystem (98-800001) is an O.E.M. sourced Optical Tranceiver package containing
discreet TX and RX modules and supplied as a 1U rack mount tray
Parameter Specification
Optical Output Power 4 mW
Wavelength, peak 1310 1550 nm
Frequency Response, 50 to 2.2 GHz ± 1.5 dB
Input and Output VSWR 1.5:1
Link Gain
(2)
0 dB
Output Noise Floor
(1)
-137 dBm/Hz
Input 3rd Order Intercept
(1)
30 dBm
Operating Temperature 30 to +75°C
Storage Temperature 40 to +85°C
Maximum RF Input to Transmitter +20 dBm
Maximum Optical Input to Receiver 6 mW
A.C. Supply Voltage 90 – 265 VAC
Dimensions 483 x 457 x 44mm (19.0 x 18 x 1.72 in.)
(1)
SFDR, Noise and IP3 specified with 5 dB optical loss.
(2)
Link Gain specified with 1 meter fiber.
4.2.3. Optical A/B Switch FC/APC (98-700002)
Optical AB Switch FC/APC (98-700002)
Optical A/B Switch FC/APC (98-700002) an O.E.M. sourced Fibre Optic relay supplied as a 1U rack
mount tray. 98-700002 allows for the automatic switching between two optical inputs to provide a
common optical output. Manual selection of the input is also possible via toggle switches on the front
panel.