HDT HDSSFG20B User manual

20dB Fixed Gain Satellite Selector
for DIRECTV
Model HDSSFG20B
Instruction Manual
www.hdtvlabs.tv

Model HDSSFG20B
Multi-Switch Connection Instructions
Caution: Ensure all cables and connectors have no short circuits. Make all cable connections before energizing the
power supply connection or damage to the unit could occur.
1. Using High Definition RG-6 coaxial cable for all connections, attach any of the four “Slim Line” Dish outputs to any
of the four Satellite Selector inputs.
2. Connect the 99°/101° Odd Satellite Selector output to the Sat 99°/101° 13V Multi-Switch input.
3. Connect the 99°/101° Even Satellite Selector output to the Sat 99°/101° 18V Multi-Switch input.
4. Connect the 103°/119° Odd Satellite Selector output to the Sat 103°/110°/119° 13V 22kHz Multi-Switch input.
5. Connect the 103°/110°/119° Even Satellite Selector output to the Sat 103°/110°/119° 18V 22kHz Multi-Switch
input.
6. Connect the external power supply to the Satellite Selector “18VDC IN” jack.
7. Check our website at www.hdtvlabs.tv for the latest instruction manual updates. This is HDSSFG20B Rev.1.1

Model HDSSFG20B
High Definition 20dB Fixed Gain Satellite/Transponder Selector
Description
The HDSSFG20B is a Professional-Grade 4-channel fixed 20dB gain satellite/transponder selector designed
to work with DIRECTV 5 LNB dish antennas. The HDSSFG20B selects and amplifies even and odd
transponder signals from satellites 99 , 101 , 103 , 110 , and 119 . Each channel has a gain in excess of
20dB and covers a frequency range of 250MHz to 2150MHz. The amplifier is designed to recover low-level
signals that may be well below the threshold of most satellite power meters. The HDSSFG20 is used in
conjunction with residential, stacked, multiswitch, and head-end systems. MADE IN USA
Features:
Wide signal dynamic range capability
Ultra-low level signal recovery
Integrated voltage regulators and tone generators
Corrosion-resistant connectors
Rugged aluminum construction
Specification Minimum Typical Maximum
Frequency………………………………………………… 250MHz 2150MHz
Noise Figure………………………………………………. 3.5dB
Absolute Maximum Total Input Power1………………….. 0dBm
Input Power Range……..…………………………………. -75dBm2-20dBm3
Individual Transponder Maximum Output Power………... 0dBm
Gain
at 250MHz..…………………………………... 15.5dB 16.5dB 17.5dB
at 750MHz..…………………………………... 17.0dB 18.0dB 19.0dB
at 950MHz……………………………………. 17.5dB 18.5dB 19.5dB
at 1450MHz…………………………………... 18.5dB 19.5dB 20.5dB
at 1650MHz..…………………………………. 19.0dB 20.0dB 21.0dB
at 2150MHz…………………………………... 19.0dB 20.0dB 21.0dB
Channel-to-Channel Isolation4……………………………. 45dB

Specification Minimum Typical Maximum
Input Return Loss
at 250MHz……………………………………. 10dB
at 950MHz……………………………………. 25dB
at 1450MHz…………………………………... 15dB
at 2150MHz…………………………………... 11dB
Output Return Loss
at 250MHz……………………………………. 14dB
at 950MHz……………………………………. 16dB
at 1450MHz…………………………………... 20dB
at 2150MHz…………………………………... 11dB
1dB Input Gain Compression Point5
at 250MHz…………………………………….. -5dBm
at 950MHz…………………………………….. -5dBm
at 1450MHz…………………………………… -5dBm
at 2150MHz………..………………………….. -7dBm
Input Signal Power for 3rd Order Intermod Rejection Ratio of 40dB6
at 250MHz…………………………………….. -10dBm
at 950MHz…………………………………….. -13dBm
at 1450MHz…………………………………… -15dBm
at 2150MHz………..………………………….. -17dBm
DC Supply Voltage………………………………………... 18VDC20VDC
DC Supply Current………………………………………… 1.0A 1.5A
99 /101 Odd Transponder LNB Voltage…………………. 12.5VDC 13.75VDC 14.5VDC
99 /101 Even Transponder LNB Voltage………………… 17.0VDC 18.00VDC 20.0VDC
103 /119 Odd Transponder LNB Voltage…………………12.5VDC 13.75VDC 14.5VDC
103 /110 /119 Even Transponder LNB Voltage…………. 17.0VDC 18.00VDC 20.0VDC
22kHz Tone Generator Frequency…………………………. 22kHz
22kHz Tone Generator Amplitude…………………………. 0.3Vp-p 0.4Vp-p
For Indoor Use Only. The HDSSFG20B is supplied with an external 18VDC power supply. Operating
temperature of the HDSSFG20B is –40 C to +85 C. The mechanical dimensions are 6.4”W 4.4”L 1.5”H.
(Specifications subject to change without notice.)
Notes:
1. Absolute Maximum Power is the total power that arrives at the amplifier input from 250MHz to 2150MHz. Satellite power meters
typically read the power level of a single transponder at a time. If all transponders are active from 250MHz to 2150MHz and the power of
all transponders are equal, then total available input power across the 250MHz to 2150MHz bandwidth is approximated by taking the
satellite power meter reading at 1450MHz and adding 20dB. Make sure not to exceed -20dBm as measured with a satellite power meter at
1450MHz.
2. The –75dBm level assumes that the overall system noise figure is not too high such that the carrier-to-noise ratio of the satellite signal has
not been degraded such that signal recovery is not possible. Signal levels lower than –75dBm can be recovered with properly designed
systems having over-all low system noise figures. Low noise figure systems are achieved by avoiding the addition of too many attenuators
or too much loss in front of an amplifier block. It is always better to add loss after an amplifier to minimize system noise figure as long as
the signal at the amplifier input does not over-drive that amplifier.
3. Assumes maximum power levels as measured with a satellite power meter and all transponder signals active from 250MHz to 2150MHz.
(See note 1) A frequency response loss slope of 5dB is assumed, i.e. transponder power measured at 250MHz with a satellite power meter
is 5dB higher than power measured at 2150MHz due to cable loss versus frequency characteristics. If transponder power levels are equal,
limit the maximum power to –20Bm at all frequencies. An easy method to determine if the amplifier is being over-driven is to connect a
satellite power meter to the output of the amplifier and check C/N, BER, and IRD performance. If acceptable transponder power levels are
measured but low C/N values, high BER values, and low IRD levels are measured, reduce the input level into the amplifier until good
C/N, BER, and IRD results are measured.
4. Channel-to-Channel Isolation is measured referenced to the output of each amplifier. Channel-to-Channel Isolation has a typical value of
35dB at 2150MHz.
5. Measured using a single CW signal. No transponder signals present.
6. Measured using two CW signals with 1MHz spacing. No transponder signals present.
Copyright © 2010 HDTV Labs, All Rights Reserved. HDSSFG20B Manual Version: Rev. 1.1