Atec Rohde-Schwarz-SFQ Series - Manual (Page 17)

TV Test Transmitter R&S ® SFQ 17
Minimum selectable C/N ratio of Noise Generator R&S SFQ-B5
BER Measurement option R&S SFQ-B17
Only in conjunction with option R&S SFQ-B10 or option R&S SFQ-B6 model .03
Characteristics
integrated BER measurement for all dig-
ital modulation modes (DVB-C, DVB-S,
DVB-T, 8VSB, J.83-B, ISDB-T)
Input data rate max. 60 Mbit/s (serial input)
PRBS 2 23 −1/2 15 −1 to ITU-T Rec. O.151
Input
Serial BER DATA, BER CLOCK, BER ENABLE
Input impedance 75
Ω
Input level TTL
Connector BNC female
Clock, data normal, inverted
Enable always, active high, active low
BER mode
PRBS 2 23 −1/2 15 −1 to ITU-T Rec. O.151
Parallel TS PARALLEL AUX
Characteristics meet EN50083-9
Input impedance 100 Ω
Input level 100 mV to 2 V, LVDS
Connector 25-contact female, shielded
BER mode
PRBS, PRBS INVERTED 2 23 −1/2 15 −1 to ITU-T Rec. O.151
NULL PRBS PACKET evaluation of standard transport stream;
total payload corresponding to PRBS (e.g.
NULL PRBS PACKET of R&S SFQ)
PID FILTER FOR PRBS PACKET evaluation of null packets (PID=1FFF) of
standard TS with payload correspond-
ing to PRBS (e.g. stuffing with R&S SFQ
in ASI/SPI mode)
1 ) CPDF = cumulative probability distribution function, level values referred to
average output level value.
2 ) Ratio of discrete component to distributed component.
Specifications BB-FM
Broadband FM Modulator option R&S SFQ-B2
Analog modulation broadband FM for video and FM/ADR
sound subcarrier
Video transmission characteristics
Type of modulation frequency modulation (F3)
Standard PAL, SECAM, NTSC; selectable
Nominal input level (V
pp
) 1 V (75
Ω)
Video frequency deviation
Setting range 10 MHz to 40 MHz
Resolution 0.1 MHz
0 5 10 15 20 25 30 35 40 45 50 55 MHz
-12
-10
-8
-6
-4
-2
0
2
4
6
8
10
C/N
dB
BW
DVB-S
ATSC/8VSB, J.83B
DVB-T
DVB-C
ISDB-T
FM
Hum suppression with level
clamping on
>40 dB
Linear distortion
Frequency response, 0 MHz to 5 MHz
(ref. to 1.5 MHz and 25 MHz (pp)
deviation, with preemphasis and
lowpass filter)
<
±0.5 dB
Group delay, 0 MHz to 4.8 MHz <
±20 ns with lowpass filter
Transients (streaking) with 200 ns
rise and fall time < ±2%
Energy dispersal signal
Signal type 25 Hz or 30 Hz triangular signal, coupled
to frame frequency (625/525 lines)
Deviation, selectable 0 MHz to 4 MHz, automatically doubled
when the video or baseband signal is
switched off
Resolution 100 kHz
Nonlinear distortion
Measurements with standard video signal and preem-
phasis and deemphasis switched on
Differential gain at 25 MHz deviation <1.5%
Differential phase at 25 MHz
deviation
<1.5°
Video-frequency S/N ratio, ref. to
22.5 MHz deviation, with preemphasis
and deemphasis 100 kHz to 5 MHz
>70 dB rms, weighted to ITU-R
Internal noise generator
Bandwidth
Receiver bandwidth 0.1 MHz to 80 MHz (selectable)
Actual noise bandwidth 10 MHz/60 MHz
C/N setting
Variation range 50 dB
Minimum selectable C/N depending on bandwidth and modula-
tion (see diagram for R&S SFQ-B5, FM)
Resolution 0.1 dB
C/N error <1 dB
RF frequency range
With noise bandwidth
≤10 MHz ≥15 MHz
With noise bandwidth >10 MHz
≥60 MHz
2 FM Sound Subcarriers option R&S SFQ-B3
Only in conjunction with option R&S SFQ-B2 (included once in R&S SFQ-B2)
Number of subcarriers per module
2
Frequency range 5 MHz to 9 MHz
Resolution 10 kHz
Frequency deviation of IF carrier
caused by FM sound subcarriers
Setting range (RF deviation) 1 MHz (pp) to 4 MHz (pp)
Resolution 10 kHz
Audio signal input
Frequency range 30 Hz to 15 kHz
Bandwidth without lowpass filter 100 kHz
Nominal input level +9 dBm (600 Ω)
Input impedance >5 k Ω, balanced
Connector Lemo Triax
Internal modulation generator (DSP)
Frequency range 30 Hz to 15 kHz
Resolution 100 Hz
Modulation distortion <0.5%
Audio S/N ratio (ref. to 50 kHz devi-
ation, AC-coupled) >65 dB, weighted to CCIR
Preemphasis 50 µs, 75 µs, J.17, OFF; selectable
2 ADR Sound Subcarriers option R&S SFQ-B4
Only in conjunction with option R&S SFQ-B2 (to ADR specifications)
Number of subcarriers
2
Frequency range 0.1 MHz to 9 MHz
Resolution 10 kHz
Frequency deviation of IF carrier
caused by ADR sound subcarriers
Setting range (RF deviation) 1 MHz (pp) to 4 MHz (pp)
Resolution 10 kHz
Type of modulation QPSK