OPERATING INSTRUCTIONS
STU 720if
22
S
PECIFICATIONS
Due to continued product improvement, this specification is subject
to change without prior notice.
GENERAL
Front Panel Control Buttons
On/Standby, TV/Audio,
Programme/
Volume up/down
Reset
On/Standby and TV/Audio
simultaneously
RCU
Multi-button, infrared, battery
operated RCU.
Range 7 m, ± 45° in
horizontal
plane,
± 20° in the vertical plane.
Batteries Type AAA
User Interface
Full On-screen Display with
point and select menus for
setup. TV viewing, audio
listening, teletext and future
interactivity
Subscription service facilities
Smart Card, on-board CA
software and over-the-air
upgradable software
Built-in modem (optional)
Data port
UHF Modulator
PAL BG, Ch 21 to 69, preset to
Ch 38
Mains Voltage
210 - 250 V AC 50 Hz
Power Consumption
30 W Maximum
Dimensions
357 x 70 x 240 mm (W x H x D)
Weight
Approx. 2.5 kg (unpacked)
Operating Conditions:
Temperature 5 °C to 45 °C
Relative Humidity
5% to 80% <38 °C wet bulb
temperature
Altitude
0 to 2000 m
CONNECTORS
LNB input
F-connector
LNB output
F-connector
Terrestrial antenna input
IEC 169 female
TV RF output
IEC 169 male
TV SCART
SCART
VCR SCART
SCART
S-VHS
MiniDIN
Variable left channel audio
output to TV/VCR
RCA
Variable right channel audio
output to TV/VCR
RCA
Fixed left and right audio
channels to Hi-Fi
RCA
Mono audio to TV/VCR
RCA
Internal modem (where fitted)
RJ11
External modem port
9 pin D-type male
Data service port
9 pin D-type female
SATELLITE RECEIVER TUNER
Receiver Frequency Range
950 to 2150 MHz
Input Signal Level
-20 dBm to -65 dBm
Polarisation Switching
13.5 - 18 V DC 350 mA
maximum, short circuit
protection
DiSEqC
Modulated onto 22 kHz
DEMODULATOR
Type
QPSK
Input Data Rate
2 to 45 Mb/s/
Error Correction
DVB specified FEC code rates
STU VIDEO
MPEG-2
STU AUDIO
Decompression
MPEG-1, MPEG-2 Layer
Musicam
Channels
Single channel, joint stereo,
stereo
Sampling Frequencies
32.0 kHz, 44.1 kHz and
48.0 kHz
REMODULATOR RF SIGNAL
Depth of Modulation
88% PAL B/G
Output Channel Range
21 to 69 (preset to channel 38)
Vision-to-sound ratio
14 dB
Vision-to-sound frequency
variance
± 20 kHz from nominal
Vision carrier frequency drift
± 10 kHz
RF output level
73 dBµ V
Output spurii
<-60 dB
RF stray radiation
<20 dBµ V at antenna input
Intermodulation
-60 dBc
RF bypass bandwidth
47 MHz to 860 MHz
RF bypass insertion gain
2 dB
RF bypass channel tilt
1 dB
MEMORY
RAM
4 Mbyte
Flash - EEPROM
2 Mbyte
NVRAM
16 kbyte
VIDEO SIGNAL
Output
1 V peak-to-peak, 75
Format
PAL
Bandwidth
5 MHz
AUDIO SIGNALS
Output
1 V r.m.s. into 10 k
Frequency range
20 Hz to 20 kHz at 44.1 kHz
sampling rate
Dynamic range
80 dB
Distortion
± 0.2% @ 1 kHz
Noise
-80 dBµ
L-R level difference
0.5 dB
Crosstalk
-60 dB
EXTERNAL MODEM
Maximum data rate
19200 bits/s
