Rohde & Schwarz SFM User manual

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The TV Test Transmitter ¸SFM sup-
plies vision and sound signals for all
presently used TV standards.
All parameters of the vision and sound
carriers generated by the ¸SFM are
automatically set according to the
selected TV standard.
In addition, all parameters can be varied
in a wide range about the specified stan-
dard values.
By virtue of its versatile configuration, the
¸SFM is an ideal solution for a wide
variety of applications in:
◆Development and service
◆Production and quality assurance of
TV sets and modules
◆EMC measurements
Main features of the ¸SFM:
◆Generation of standard TV signals
(standards B/G, D/K, L/L’, I, M, N, K1)
including stereo/dual sound and
NICAM
◆Double-sideband test modulator for
all IFs between 32 MHz and 46 MHz
◆RF upconverter, 5 MHz to 1000 MHz,
with high frequency resolution (1 Hz)
◆Audio generator, stereo coder and
NICAM generator
Text in Weiß
TV Test Transmitter ¸SFM
The multistandard platform for tomorrow’s TV
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2TV Test Transmitter ¸SFM
Uses
The flexible modular concept based on
plug-ins (freely selectable) makes the
¸SFM suitable for a wide range of
applications.
By virtue of the highly compact design, a
great number of different configurations
can be implemented in a single
¸SFM.
Depending on application and configura-
tion, the ¸SFM may be used as
–Multistandard signal generator
providing vision and sound modula-
tion signals for up to seven TV stan-
dards (B/G, D/K, L/L’, I, M, N, K1)
including sound as is required by the
dual-carrier method or NICAM-728 as
well as an RF upconverter used as a
tunable test signal source
–IF modulator comprising several
vision/sound modulators to various
standards equipped for use in multi-
channel and multistandard systems
Characteristics
The most important features of the
¸SFM are:
◆Generation of TV RF/IF signals (vesti-
gial sideband amplitude modulation)
to specified standards
◆All vision and sound modulation parame-
ters variable in wide ranges about stan-
dard values (see page 5)
◆Vestigial sideband filter (SAW) and
group-delay precorrection can be sep-
arately switched on/off
◆Double-sideband test modulator for
all IFs between 32 MHz and 46 MHz
◆RF upconverter from 5 MHz to
1000 MHz; suitable for back-channel
operation in analog and digital modu-
lation modes
◆Switchover between upper and lower
sideband at RF
◆Maximum RF output level from
+10 dBm to 0 dBm depending on
operating mode (optimum signal-to-
noise and signal-to-intermodulation
ratio)
◆Non-interrupting level reduction
down to −14 dB
◆RF frequency resolution 1 kHz or 1 Hz
for precision offset
◆Frequency locking for all oscillators
via internal 10 MHz reference fre-
quency or external precision refer-
ence frequency
◆RF output impedance 50 Ω(female N)
or optional 75 Ω(female BNC)
◆AF generator, 30 Hz to 15 kHz, and
stereo/dual-sound coder (IRT/Korea)
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TV Test Transmitter ¸SFM 3
◆Wideband audio input for BTSC sig-
nals up to 120 kHz (standard M)
◆NICAM QPSK modulator with genera-
tor for frequencies from 0 Hz to
15 kHz, adjustable BER, PRBS and I/Q
test sequences
◆NICAM intercarrier output adjustable
between 5 MHz and 9 MHz, digital
data/clock inputs/outputs for
728 kbit/s
◆Instrument settings storable in inter-
nal memory or on memory card
(PCMCIA)
◆System-compatible due to IEC/IEEE-
bus and RS-232-C interface
◆Connectors for external keyboard and
external monitor
Description
Each ¸SFM frame can accommodate
up to ten plug-ins so that the standards
B/G, D/K, I, L/L’, M, N and K1 can be
implemented in a single ¸SFM (see
Fig. on right).
Vision modulator
The IF of the vision modulator (Fig. below)
is set automatically when the standard is
selected. The vision carrier is modulated
with the residual-carrier setting stipu-
lated by the standard. Hard and soft video
clamping can be selected. If soft clamp-
ing is used, hum is not suppressed for
example.
In the multistandard module, the ampli-
tude modulation spectrum is limited by
standard-dependent vestigial sideband
filters (high-quality SAW filters). A variety
of video group-delay precorrections are
also implemented in this module.
Sound modulators
Similar to the vision carrier, the sound
carrier IF, the sound-carrier method as
well as country-specific features are set
automatically when a standard is
selected. In addition, the frequency spac-
ing between vision and sound carrier can
be varied within ±7 MHz in 1 Hz steps. The
sound-carrier method (mono, stereo, dual
sound, mono + NICAM) is selected in the
standards menu. AF coding is then carried
out automatically. Audio multiplex signals
with a frequency of up to 120 kHz can be
used for the BTSC method (standard M).
The frequency deviation and the output
level of the sound carriers are also set
automatically in line with the standard.
Example of ¸SFM equipped for standards
B/G, D/K, I, L/L’, M/N and K1
Intermediate frequencies and VSB
filtering for various standards
Multistandard
Multistandard
Processor
User interface
Sound 1 modulator
(FM)
Sound 2 modulator (FM/AM)
Coder
NICAM
generator/modulator
RF upconverter
5 MHz to 1000 MHz
Vision modulator
Video Generator
SGPF, SGSF, SGMF
10
9
8
7
6
5
4
3
2
1
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4TV Test Transmitter ¸SFM
NICAM modulator
The modulator generates a standard
QPSK signal with the correct IF
(33.05 MHz/32.348 MHz) for standards I
and B/G. A NICAM signal at the correct
RF is available for standard L/L’. In this
case, the VSB characteristic is identical to
that of standard B/G, i.e. the IF of the
NICAM carrier for standard L/L’ is also
33.05 MHz.
Since pulse filtering and the modulator
are digital, a signal is obtained with the I
and Q signals in quadrature without any
phase error.
The NICAM modulator has inputs for an
external data stream and a clock signal.
When the external NICAM data stream
fails, the test transmitter automatically
switches over to a pseudo-random bit
sequence (PRBS). Modulation can be
switched off (continuous wave). A
defined bit error rate can be set for the
NICAM data stream.
The internal generator delivers a stan-
dard NICAM data stream which com-
prises a frame-alignment word, select-
able control and additional data bits plus
the digitally coded audio signals. The
required signal coding can also be
selected. The appropriate intercarrier is
available at a separate output.
RF upconverter
The RF upconverter has an internal and an
external IF input; the external one can be
tuned to any IF vision carrier frequency
between 32 MHz and 46 MHz. Thus almost
any IF signal can be converted to the RF. At
the RF it is possible to select the upper or
lower sideband.
By virtue of this selection capability, all
L/L’ channels can be generated to stan-
dard. With the lower sideband selected,
TV standards at any IF are possible (e.g.
standard M, Japan, 58.75 MHz).
An RF output impedance of 50 Ωor 75 Ω
(optional) can be selected.
Special configurations for intermodula-
tion and linearity measurements in the
form of programs may be called up. Level
combinations for vision, sound 1 and 2
and sideband as specified in the stan-
dards are set with the modulation
switched off. Linearity measurements are
performed by automatic vision-carrier
level switching every two seconds.
If parameters for the vision, NICAM and
sound modulators are set to non-stan-
dard values, the display outputs a warn-
ing. However, compliance with the
appropriate standard can be restored
with a single keystroke.
Remote control
The ¸SFM is equipped with an IEC/
IEEE interface to SCPI and also has an
RS-232-C interface for the remote control
of all functions.
Settings can be loaded from or to an
external memory card via a PCMCIA con-
nector. Software updates can be carried
out via the memory-card interface and
the serial interface.
A powerful processor system controls all
¸SFM modules via the serial SERBUS
developed by Rohde&Schwarz. The
SERBUS allows modules to be plugged
into any slot.
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TV Test Transmitter ¸SFM 5
Setting range for ¸SFM parameters
Parameter Setting range Step width
RF upconverter
Output frequency
range 5 MHz to 1000 MHz 1 kHz or
1 Hz
RF level (absolute level), ref. to 50 W
Low noise mode +10 dBm to –99 dBm 0.1 dB
117 dBmV to 8 dBmV 0.1 dB
707.1 mV to 0 mV 0.1 dB
Normal mode +6 dBm to –99 dBm 0.1 dB
113 dBmV to 8 dBmV 0.1 dB
446.2 mV to 0 mV 0.1 dB
Low distortion 0 dBm to –99 dBm 0.1 dB
mode 107 dBmV to 8 dBmV 0.1 dB
223.6 mV to 0 mV 0.1 dB
RF level (non-interrupting),
referred to absolute
level 0 dB to –14 dB 0.1 dB
IF input frequency
range 32 MHz to 46 MHz 1 kHz or
1 Hz
IF input level (for
external modulator) 0 dBm to –7 dBm 0.1 dB
Vision modulator
Vision carrier (double-
sideband modulation) 32 MHz to 46 MHz 10 kHz
Residual carrier
(negative modulation) 0% to 30% 0.1%
Modulator balance –50% to +50 1
Average level (offset) –50% to +50% 1%
Sound 1 modulator
Internal AF 0.03 kHz to 15 kHz 10 Hz
Deviation (15 kHz) 0 kHz to 100 kHz 10 Hz
Carrier frequency |fvc–fs|≤7 MHz 1 kHz or
1 Hz
Carrier level –6 dB to –34 dB 0.1 dB
Preemphasis 50 ms/75 ms/off –
Sound 2 modulator (FM)
Internal AF 0.03 kHz to 15 kHz 10 Hz
Deviation (15 kHz) 0 kHz to 100 kHz 10 Hz
Carrier frequency |fvc–fs|≤7 MHz 1 kHz or
1 Hz
Carrier level –10 to –38 dB 0.1 dB
Preemphasis 50 ms/75 ms/off –
Parameter Setting range Step width
Sound 2 modulator (AM)
Internal AF 0.03 kHz to 15 kHz 10 Hz
Modulation depth 0% to 100% 0.1%
Carrier frequency |fvc–fs|≤7 MHz 1 kHz or
1 Hz
Carrier level –10 dB to –38 dB 0.1 dB
Stereo/dual-sound coder
Pilot carrier 50 kHz to 60 kHz 10 Hz
Pilot deviation 1 kHz to 4 kHz 100 Hz
Pilot modulation frequency
IRT 117.5 Hz/ 0.1 Hz
274.1 Hz
±20 Hz
Korea 149.9 Hz/ 0.1 Hz
276 Hz
±20 Hz
Pilot modulation depth 0% to 90% 0.1%
NICAM generator
Internal AF (L) 0 kHz to 15 kHz 20 Hz
Internal AF (R) 0 kHz to 15 kHz 20 Hz
Headroom L (400 Hz)
Preemphasis (J17)
On 16.5 dB to 60 dB 0.1 dB
Off 0 dB to 60 dB 0.1 dB
Headroom R (400 Hz)
Preemphasis (J17)
On 16.5 dB to 60 dB 0.1 dB
Off 0 dB to 60 dB 0.1 dB
Check bits 3 and 4 00 to 11 binary
(2 bits)
Additional data 000 0000 0000 to binary
111 1111 1111 (11 bits)
NICAM modulator
BER 2 × 10-3 to 1.2 × 10-7 –
Carrier frequency 32.348 MHz/ 1 kHz or
33.05 MHz 1 Hz
±200 kHz
Intercarrier frequency
Standard B/G, I 5.0 MHz to 9.0 MHz 1 kHz or
1 Hz
Standard L/L‘ 5.85 MHz 1 kHz or
±200 kHz 1 Hz
Carrier level –13 dB to –40 dB 0.1 dB
All vision and sound carriers can be separately switched on and off.
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6TV Test Transmitter ¸SFM
Status line
At the top of the large LCD, a clearly
arranged status line is displayed where
the current operating status of the
¸SFM can always be seen at a
glance.
The fields of the main menus to be called
up for instrument settings are displayed
below.
Main menus
The ¸SFM’s menu structure permits
efficient operation even without any
knowledge of the hardware configuration.
Settings disabled in the selected operat-
ing mode or menu items not provided for
the present instrument configuration are
written in italics.
Selecting one of the main menus by
means of the cursor key opens up a sub-
menu where further selections can be
made.
Possible settings for the chosen menu
item are displayed in pull-down menus.
Within a particular main menu, the com-
plete menu tree together with all pull-
down menus and current parameter set-
tings is shown on the LCD.
The main menus are:
RF FREQUENCY
In this menu, the RF output frequency is
set by a numerical entry of frequency and
channel or special channel number. In
addition, the upper and lower sideband
at the RF can alternatively be selected.
Self-explanatory menu guiding
Easy-to-understand and clearly structured menus allow safe and fast operation of the ¸SFM at all configuration stages.
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TV Test Transmitter ¸SFM 7
RF LEVEL
In this menu, the RF output level and the
RF level mode (low distortion, normal, low
noise or continuous) can be set. The RF
signal may also be switched to the
optional 75 ΩBNC output.
STANDARD
The TV standard, associated country-spe-
cific characteristics (e.g. channel alloca-
tion) and the type of sound-carrier modu-
lation can be selected in this menu (see
Fig. at center of left page). All standard-
specific parameters are automatically set.
MODULATOR
In this menu, all vision and sound modu-
lation parameters can be varied over a
wide range (see page 5) about the values
set automatically when a standard is
selected. Even non-standard test signals
can be generated (e.g. for determining
limit valuesof TV modules). Parameters to
standard can be restored by a single key-
stroke (F3, F4).
VIDEO
In this menu, one of the three available
video inputs can be selected. An input
with loop-through filter (high-impedance)
or terminated into 75 Ωmay be selected
on the front panel.
With AUTOM. VIDEO SWITCH selected,
the video inputs are assigned to different
TV standards (e.g. PAL, SECAM, NTSC)
and switched accordingly when a stan-
dard is selected.
SPECIAL
This menu offers various programs with
defined vision- and sound-carrier settings
for intermodulation and linearity mea-
surements (2-, 3- and 4-signal measure-
ments).
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8TV Test Transmitter ¸SFM
In the sweep mode, the modulation is
switched off and the vision carrier may be
used for measuring the frequency
response, for example.
Keys
The ¸SFM is operated with a mini-
mum of keys. In addition to the cursor
keys and ENTER, only the keys BACK for
returning to the previous menu and
HOME for returning to the main menu bar
are required.
Numerals can be entered via the keypad
or with the aid of the cursor keys.
With MONITOR EXT, the display on the
¸SFM can be transferred to an exter-
nal monitor.
When fast tests are to be carried out, the
IF modulation can directly be switched off
and on with MOD OFF and the RF carrier
with RF OFF without the associated sub-
menu being opened.
With the aid of the MEM key, instrument
settings can be stored internally or on a
memory card and called up again.
Information on the hardware and firm-
ware configuration of the ¸SFM is
called up with the SETUP INFO key. Via
this key, the parameters for the RS-232-C
and IEC/IEEE-bus interfaces can be set,
and the RF frequency resolution, level
unit and type of 10 MHz synchronization
can be selected.
A detailed overview on the current status
of all functional groups of the ¸SFM
is displayed when the STATUS key is
pressed.
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TV Test Transmitter ¸SFM 9
Group-delay response
Double-sideband modulation,
precorrection off, vision
carrier ±5 MHz ≤10 ns
Group-delay precorrection
0 MHz to 4.43 MHz ≤10 ns
4.43 MHz to 4.8 MHz ≤15 ns
Vestigial-sideband modulation additional ripple due to SAW filter
B/G ≤20 ns (–4.8 MHz to +0.5 MHz)
D/K ≤20 ns (–5.5 MHz to +0.5 MHz)
I≤30 ns (–5.2 MHz to +1 MHz)
L/L’ ≤20 ns (–1.25 MHz to +6 MHz)
M, N ≤20 ns (–4 MHz to +0.5 MHz)
Residual carrier
Setting range 0% to 30%
Resolution 0.1%
Error <1.5%
Modulation nonlinearity
Modulation in range 8% to 100% ≤1.5% (for standards with negative modula-
tion)
Differential gain error
for colour subcarrier modulated
in range 10% to 85 % ≤1.5% (for standards with negative modula-
tion)
Differential phase error
for colour subcarrier modulated
in range 10% to 85 % ≤1°(for standards with negative modulation)
Video signal-to-noise ratio
Double-sideband and vestigial-
sideband modulation,
measured to ITU-R Rec. 567
rms, weighted, 0.2 MHz to 5 MHz ≥70 dB
hum, peak-to-peak, 0 kHz to 1 kHz ≥60 dB
Intercarrier signal-to-noise ratio
FuBK test pattern 56 dB (30 kHz deviation)
All-black picture 58 dB (30 kHz deviation)
Intermodulation measurement (fixed programs)
(Level in dB) Vision Sound Sound Sideband
carrier carrier 1 carrier 2*)
Intermodulation IM 0 –10 –20 off
IM/K –8 –10 –20 –16.5
IM/B –5.5 –11.5 –20 –12
Linearity LIN1 –2.5/–8 –10 –20 –32
LIN2 –2.5/–20 –10 –20 –32
*) In connection with NICAM Modulator ¸SFM-B10 only.
(Linearity measurement with vision-carrier level switching every 2 s)
Sound 1 modulator, sound 2 modulator
AF signal input
B/G, D/K, I, M, N, K1 +6 dBm (1.546 V rms) for 0 kHz to ±100 kHz
deviation, floating, Zin >5 kW,
switchable internal/external
L/L’ +6 dBm (1.546 V rms) for m = 0% to 100%
Sound-carrier IF
Frequency settable
Setting range |fvision carrier– fsound| ≤7 MHz
Accuracy <2 × 10-6
Level settable
Accuracy at standard level
Sound
1: –13 dB with B/G, D/K, I, M/N ≤±0.5 dB
–10 dB with K1
Sound
2: –20 dB with B/G, D/K, L ≤±0.5 dB
Accuracy over setting range
Sound 1 referred to –6 dB
–6 dB to –16 dB ≤±0.3 dB
>–16 dB to –34 dB ≤±0.6 dB
Sound 2 referred to –12 dB
–12 dB to –22 dB ≤±0.3 dB
>–22 dB to –38 dB ≤±0.6 dB
Specifications
Vision modulator
Video input signal (standard level) 1 V pp into 75 W
Standards B/G, D/K, I, K1, L/L’, M, N
Video input 1 on front panel with loop-through filter (high-
impedance), with internal or
external 75 W termination
2 on rear panel (75 W)
Connectors BNC
Selection of inputs automatic or manual
Return loss (0 to 6 MHz) >34 dB for all video inputs
IF output signals
Frequency drift
(internal 10 MHz reference) <2 × 10-6
Vision-carrier frequency with
vestigial-sideband filter (SAW) 38.9 MHz for B/G, D/K, I
32.7 MHz for L/L’, K1 (sound: mono)
38.9 MHz for L/L’ (sound: mono/
NICAM)
45.75 MHz for M, N
Vision-carrier frequency with
double-sideband modulation 32 MHz to 46 MHz, selectable in 10 kHz steps
over the full range
IF output level –3 dBm ± 0.5 dBm into 50 W
IF output 1 internal (for RF upconverter)
1 external (for 50 W termination)
Harmonics suppression
Harmonics >40 dB
Nonharmonics >60 dB
Modulation characteristics
Type of modulation C3F (A5C), negative, for B/G, D/K, I, K1, M, N
C3F (A5C), positive, for L/L’
Group-delay precorrection
(max. 3 settings per multistandard
plug-in) standard B/G, ITU-R
standard B/G, ITU-R 1/2
standard B/G, Sweden (A)
standard B/G, Australia
standard D/K, ITU-R, Report 308
standard D/K, OIRT, TK-III-830
standard I, full precorrection,
South Africa
standard K1
standard M/N, FCC
full precorrection (flat)
Operating mode double-sideband modulation with or without
group-delay precorrection for IF 32 MHz to
46 MHz
or
vestigial-sideband modulation (SAW filter)
with or without group-delay precorrection for
standards B/G, D/K, I, L/L’, M, N, K1
Level control
Clamping on (to back porch);
hard or soft clamping selectable,
off
Average value for standards with
negative modulation (clamping off,
AGC off) ±50% offset
Hum suppression
in hard-clamped mode ≥57 dB (with 30% superimposed hum)
Amplitude-frequency response
Double-sideband modulation,
precorrection off
Vision carrier ±5 MHz ≤0.15 dB
±8 MHz ≤0.3 dB
Vestigial-sideband modulation
B/G 38.9 MHz IF with precorrection ≤0.5 dB (–0.6 MHz to +4.8 MHz)
D/K 38.9 MHz IF with precorrection ≤0.5 dB (–0.6 MHz to +5.8 MHz)
I 38.9 MHz IF w/o precorrection ≤0.5 dB (–1 MHz to +4.8 MHz)
L/L’ 32.7 MHz IF w/o precorrection ≤0.5 dB (–1 MHz to +5.8 MHz)
M 45.75 MHz IF with precorrection ≤0.6 dB (–0.6 MHz to +4 MHz)
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10 TV Test Transmitter ¸SFM
Modulation characteristics
B/G, D/K, I, M, N, K1
Type of modulation F3, with preemphasis 50 ms or 75 ms
Signal-to-noise ratio >70 dB (referred to 30 kHz deviation)
L/L’
Type of modulation A3, without preemphasis
Signal-to-noise ratio >70 dB, weighted and unweighted
(ref. to 100% modulation)
AF generator (DSP) separately selectable for left and right
channel or mono 1 and mono 2
Setting range 30 Hz to 15 kHz
Resolution 10 Hz
Frequency error ≤±0.1% ±3 Hz
Distortion (measured via
modulator/demodulator) <0.3% (60 dB)%
TV stereo/dual-sound coder
AF input signals L/R or AF1/AF2
AF output signals (coded)
IRT coding Sound channel 1 Sound channel 2
Mono AF –
Mono and pilot AF AF + pilot
Dual sound AF1 AF2 + pilot
Stereo m = 0.5× (L+R) R + pilot
Korean coding m = 0.5× (L+R) 0.5× (L-R) + pilot
Crosstalk
Dual sound >70 dB
Stereo >46 dB
Pilot carrier in sound channel 2
Pilot deviation 1 kHz to 4 kHz
Pilot frequency IRT 54.69 kHz = 3.5 fH
Pilot frequency Korea 55.07 kHz
NICAM generator
Operating modes stereo
mono + data
dual sound
data
Audio frequencies
Setting separately for left and right channel or
mono 1 and mono 2
Setting range 0 kHz to 15 kHz
Resolution 20 Hz
Frequency error <1 Hz
Audio amplitude (headroom)
Setting separately for left and right channel or
mono 1 and mono 2
Preemphasis J17 on (ref. to 400 Hz)
Setting range 16.5 dB to 60 dB
Resolution 0.1 dB
Error in range 16.5 dB to 30 dB <0.3 dB
Preemphasis J17 off (ref. to 0 to 15 kHz)
Setting range 0 dB to 60 dB
Resolution 0.1 dB
Error in range 16.5 dB to 30 dB <0.3 dB
Overall setting error <1 dB
Data sequence 11 bits, freely selectable, periodic
repetition
Control bits C3 and C4, freely selectable in all
operating modes
Additional data AD0 to AD10, freely selectable in all
operating modes
Data output
Data rate 728 kbit/s
Output level TTL into 75 W (AC-coupled)
Clock output
Clock frequency 728 kHz
Output level TTL into 75 W (AC-coupled)
NICAM modulator
Operating modes
Internal data stream from NICAM generator
External external data stream (with or without
clock)
PRBS pseudo-random bit sequence
CW continuous wave (unmodulated carrier)
TEST I/Q 3 fixed 11-bit sequences for direct I/Q
modulation
Failure of external data automatic switchover to internal PRBS
Bit error rate (BER)
BER internal (adjustable) 2 × 10-3 to 1.2 × 10-7/off
external bit errors added to external data signal
I/Q signals interchange of I and Q paths possible
Type of modulation differential QPSK
Data rate 728 kbit/s to NICAM specifications
Digital pulse filtering
Resolution 8 bit
Form factor
B/G, L/L’ 40% cosine roll-off
I 100% cosine roll-off
Spurious emissions
B/G, L/L’ (>290 kHz) <–40 dB
I (>390 kHz) <–40 dB
Amplitude error (±182 kHz) <0.5 dB
Group delay <50 ns
QPSK phase error <0.15°(digital modulation)
Level error
from 0 to 15 dB <0.5 dB
in the whole range <1 dB
Spurious <–57 dB
Carrier frequencies (adjustable)
B/G 33.05 MHz
I 32.348 MHz
L/L’ 33.05 MHz
Tuning range ±200 kHz
Resolution 1 Hz
Inputs
Data input
Data rate 728 kbit/s to NICAM specifications
Capture range of PLL ≤10 bit/s
Input impedance 75 W
Input level TTL, into 75 W (DC-coupled)
Clock input
Clock frequency 728 kHz
Capture range of PLL ≤40 Hz
Input level TTL, into 75 W (AC-coupled)
Outputs
Intercarrier output
Output impedance 50 W
Output level –3 dBm to –25 dBm (manually adjustable)
Intercarrier frequencies (adjustable)
B/G 5.85 MHz (5 MHz to 9 MHz)
I 6.552 MHz (5 MHz to 9 MHz)
L/L’ 5.85 MHz (±200 kHz)
Resolution 1 Hz
Spurious with CW
(0 to 20 MHz), 0 dBm output level
Harmonics <–40 dB
Nonharmonics <–50 dB
Upconverter
Frequency
IF input 1 for internal modulator
IF input 2 for external modulator
Input frequency range 32 MHz to 46 MHz ±8 MHz for double-
sideband modulation
Output frequency range 5 MHz to 1000 MHz, 1 Hz steps
RF tuning entry of frequencies via numeric keypad
in MHz or entry of TV channels (country-
specific)
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TV Test Transmitter ¸SFM 11
RF sideband (selectable) upper (standard) or lower sideband
Frequency deviation (with internal
10 MHz reference frequency) <2 × 10-6
Reference frequency
Input/output frequency 10 MHz
Input level (10 MHz, external) 0.1 Vrms to 1 Vrms
Output level (rms) 5 dBm ±1 dB (corr. to 395 mV/50 W)
Level
IF input level range 0 dBm to –7 dBm into 50 W
RF output level (max. level)
Low noise +10 dBm to –99 dBm
Normal +6 dBm to –99 dBm
Low distortion 0 dBm to –99 dBm
Resolution 0.1 dB
Total error <±1.5 dB
Return loss (level mode: normal,
0 dBm RF output level)
50 W output >18 dB
75 W output >15 dB
RF frequency response
in TV channel ≤0.5 dB (5 MHz to 950 MHz)
Overall transmission characteristics
(spurious signals with vision/sound ratio of 10:1, * = low-distortion mode)
Nonharmonics* ≥66 dB
Intermodulation
Vision (0 dB)/sound 1 (–10 dB) >56 dB
Vision (–8 dB)/sound 1 (–10 dB)/
Sound 2 (–16 dB) >76 dB
Harmonics
LOW DIST. ≥45 dB
NORMAL ≥40 dB
Differential gain error* ≤2.5%
Differential phase error* ≤2°
Video S/N ratio,
(low-noise mode, referred to
black-to-white transition)
0.2 MHz to 5 MHz (noise) ≥66 dB rms, weighted
10 Hz to 1 kHz (hum) ≥60 dB pp, unweighted
Audio S/N ratio up to 15 kHz
(with pre- and deemphasis)* ≥66 dB (30 kHz deviation)
General data
Rated temperature range +5°C to +45°C
Operating temperature range 0°C to +50°C
Storage temperature range –40°C to +70°C
Power supply 100 V to 120 V/200 V to 240 V
+10%/–15%,
47 Hz to 63 Hz (160 VA)
Dimensions (W × H × D) 435 mm × 192 mm × 460 mm
Weight 20 kg
Ordering information
Basic units
TV Test Transmitter ¸SFM 2007.9106.10
Modulator unit with vision modulator,
FM sound modulator with AF generator
and multistandard plug-in (3 TV standards)
(without RF upconverter)
TV Test Transmitter ¸SFM 2007.9106.50
Modulator unit with vision modulator,
FM sound modulator with AF generator
and multistandard plug-in (3 TV standards)
and
RF upconverter, 5 MHz to 1000 MHz, 50 W
TV Test Transmitter ¸SFM 2007.9106.90
RF upconverter, 5 MHz to 1000 MHz, 50 W
(without modulator unit)
Accessories supplied
Audio cable, power cable, spare fuses, operating manual
Options
Multistandard Plug-in ¸SFM-B7 2008.0248.02
2 VSB SAW filters, 3 group-delay
precorrections for further TV standards
Sound 2 Modulator ¸SFM-B9 2008.0183.02
Switchable FM/AM, dual-sound
coder (without AF generator)
QPSK Sound Modulator for NICAM 728 ¸SFM-B10 2008.0302.02
with NICAM generator, I/Q test signal,
BER and PRBS
RF Output, 75 W (selectable) ¸SFM-B16 2007.9212.02
Recommended extras
Memory Card, 4 Mbyte (flash) 0008.5499.00
Cable connector, Lemo Triax 0231.9182.00
Audio cable (2 × Lemo Triax/
1 × 5-way to DIN 41524) 2020.6636.00
19" Adapter (4 height units) for rackmounting ¸ZZA-941 0396.9471.00
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Printed in Germany 0602/0804 (Pe bb)
ROHDE&SCHWARZ GmbH & Co. KG ⋅Mühldorfstraße 15 ⋅81671 München ⋅Germany ⋅P.O.B. 8014 69 ⋅81614 München ⋅Germany
Telephone [phone] ⋅www.rohde-schwarz.com ⋅CustomerSupport: Tel. [phone], Fax [phone], E-mail: [email protected]
PD 0757.1702.23 · TV Test Transmitter ¸SFM · Trade names are trademarks of the owners · Subject to change · Data without tolerances: typical values
Certified Quality System
ISO 9001
DQS REG. NO 1954 QM
Certified Environmental System
ISO14001
DQS REG. NO 1954 UM
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