Chapter 1 • Introduction
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6
1038056-0001 Revision A
Saturated transmitter
Table 5 lists the HX260 saturated transmitter specifications and
Table 6 lists the accompanying ODU control signal
characteristics.
Safe operating temperature
range
5 to 40°C (Above 5000 ft altitude, reduce maximum
temperature by 1°C per 1000 ft)
Safe operating humidity range 5% to 95% non-condensing
Safe altitude
10,000 ft
Cooling method
Dual fan
Protocol support
TCP/IP (Transmission Control Protocol / Internet Protocol)
protocol suite
Table 4: HX260 satellite router specifications (Continued)
Product element
Specification
Table 5: Saturated transmitter specifications
Parameter
Value
Physical Interface
Female F-connector
Output Frequency
Ku-Band IF: 107.421875MHz to 113.28125MHz
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Extd C IF: 81.25MHz to 89.23611MHz
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India C IF: 105.078125MHz to 109.765625MHz
IF Impedance
75 Ohm
Step Size
< 0.01 Hz tuning increments
Output Power
-2 dBm minimum, +4 dBm maximum
Frequency Accuracy
< 1 Hz at IFL output with tuner locked to outroute
Output Return Loss
> 7 dB return loss into 75 ohm from 81.25 MHz to 234.375 MHz.
Transmission Format
Constant Envelope Offset QPSK (CE-OQPSK), TDMA burst mode
Symbol Rate
256 ksps, 512 ksps, 1.024 Msps & 2.048 Msps
Modulation scaling at IFL
Ku band IF -128, ExtdC -72 and India C -64
Note:
The HX260 saturated IF F-connector connects to an ODU
via the transmit IFL. The transmit IFL will carry the following
signals and DC Power between the HX260 and the ODU.
Table 6: ODU control signal characteristics
Signal / Property
Description
10.00 MHz ODU-C
This is a 10.00 MHz signal which, when on, will
enable the ODU to transmit to an in-route carrier. Its
nominal level is 1 dBm +/- 4.0 dBm
ON/OFF isolation for 10MHz
> 25 dBc
1.0 MHz Ku-ODU Power
Control
This is a 1.0 MHz Pulse Width Modulation (PWM)
signal which when on, the nominal level is 1 dBm +/-
3.0 dB. The ON/OFF ratio is -25 dB minimum.
Transmit Carrier
Transmit output signal at 1 dBm +/- 3.0 dB
