Specifications
EASTAR UHP-1000 SERIES SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.3
(SW VERSION 2.2.9)
© ROMANTIS 2010 31 www.romantis.com
CABLE IMPEDANCE COMING TO TRANSMITTER CAN LEAD TO A HIGHER BUC CURRENT
CONSUMPTION. BUC TRIES TO CONSUME FIXED POWER AND IF PART OF THE VOLTAGE DROPS
ACROSS THE CABLE, BUC WILL HAVE TO BE FED WITH LOWER VOLTAGE AND WILL CONSUME
HIGHER CURRENT. EXAMPLE: BUC CONSUMES 40 W. CURRENT THROUGH THE SHORT CABLE
IS 1.66 A. IF BUC IS CONNECTED VIA A 2-OHM RESISTANCE CABLE, THEN ACCORDING TO
OHM’S LAW (40/I) + (2*I) = 24, AND I=2 А (!). INEXPENSIVE DOMESTIC CABLES
FEATURE RESISTANCE PER UNIT LENGTH OF ABOUT 3 TO 4 OHM PER EVERY 100 M.
In some router operation modes, certain modulator settings are missing. This is due to the
fact that settings are received from the network central station and are applied
automatically.
Modulator frequencies are specified in KHz. You can recalculate them to satellite frequencies
if you know BUC LO frequency (See Figure 15).
Modulator control commands:
---------- Modulator parameters
modulator frequency 950000-1700000 - Central frequency (KHz)
Modulator central carrier frequency in kilohertz. The recommended maximum frequency should not exceed 1550
MHz. Working with higher frequency is possible, but not guaranteed and should be tested before use.
modulator symrate 1-34000 - Symbol rate (KSps)
Carrier symbol rate. Bit rate can be calculated based on the current FEC value. Modulator shows it in its statistics
data.
modulator fec uncoded|1/2|2/3|3/4|5/6|7/8 - FEC mode
Viterbi coder error correction mode in the modulator.
modulator inversion off|on - Spectrum inversion
Spectrum inversion in transmit mode. If you know that BUC or satellite inverses spectrum, it is worth to switch
inversion on in transmit mode so as to receive non-inverted signal on the other side.
modulator power off|on - Modulator BUC power
BUC 24 V supply voltage control applied to modulator output.
modulator reference off|on - Modulator 10 MHz output
10 MHz reference signal control applied to modulator output.
modulator tx off|on|pure-carrier|balance - Tx carrier control
Transmit mode.
off – Transmit off
on - Transmit on
pure-carrier – Transmission of unmodulated carrier
balance - Transmission of interchanging 0, 1 (on the spectrum analyzer it is in the form of two spikes
with frequency shift equal to the symbol rate) used for evaluation of the residual carrier and intermodulation
values
modulator level [0-360] - TX power level (x -0.1 dBm)
Transmission signal level from -36 dBm to 0 dBm. The greater value corresponds to the lower level. The router
ensures the range from -30 dBm to -5 dBm but the circuitry allows, in the lower portion of the frequency range,
level adjustment over a wider range. It has been decided not to eliminate this capability for users. A spare decibel
may turn out to be very important for some people.
When an automatic level control system (TLC)is turned on level variation does not result in a change in the
output level but during subsequent restart the modulator first will set this new value as the initial one and only
then will adjust it according to the TLC algorithm.
If the command is entered without parameters, interactive level control is activated and it is convenient for the
values selection and adjustment.
UHP#mo le
VAL:380 1:-10 2:-1 3:+1 4:+10 Q-quit
Keys 1 and 2 can increase the level by 1 dB and 0.1 dB, respectively, whereas keys 3 and 4 –can be use to
decrease the level by 0.1 dB and 1 dB. To exit use "q" key.