General Information
Model
8904A
Ziable
1-1.
HP
8904A
Specifiatwns
(2
of
4)
OPTION
001
SPECIFICATIONS
(50Q
outputs only)
Modulation
Modulation for channel
A
ONLY, and specified for
sinewave carrier and modulation. Internal channels
B,
C,
and
D
can be used to either collectively modulate channel
A with one modulation type, or can provide simultaneous
modulation of channel A with any of the available modula-
tion types. External modulation
is
NOT possible.
Amplitude Modulation (with Option
001)
Rate:
0
Hz
to 600
kHz.
Depth range:
0%
to
100%
of carrier amplitude.
Resolution:
0.1%
of carrier amplitude.
Frequency Modulation (with Option
001)
Rate:
0
Hz
to 600
kHz.
Deviation range:
0
Hz
up to 600
kHz,
however
Resolution:
0.1
Hz
or 3% digits, whichever is less.
Phase Modulation (with Option
001)
Rate:
0
Hz
to 600
kHz.
Range:
Oo
up to 179.9O/channel, however
F,,
+
Fdeviation
<=600
kHz.
Resolution:
0.lo
or
0.001
radians.
Pulse or
DSBSC
Modulation (with Option
001)
Summation (with Option
001)
Rate:
0
Hz
to 50
kHz
(up 600
kHz
for DSBSC).
Two, three, or four channels may be summed into a single
output. Two or three channels may be summed for modula-
tion of channel A. All combinations
of
channels are accept-
able, EXCEPT FOR:
{
A+C and B+D
]
or
{
A+D and B+C
]
at the same time.
Channel-to-channel phase accuracy (equal amplitude, sine
wave signals summed into one
output):
+0.lo
or 30 ns
,
0.1
Hz
to
100
kHz,
whichever is greater.
Mathematically Derived Characteristics
AM accuracy (the higher
of):
20.024%
AM or
20.20%
of
setting, up to
20
kHz
modulation rate and
100
kHz
carrier,
1%
to 99% depth.
up to
20
kHz
modulation rate,
20
kHz
deviahon, and where
Fcarrier +Fdeviation
<=lo0
kHz.
to
20
kHz
modulation rate, where:
FM
accuracy (the higher
00:
20.1
Hz
or
20.28%
of setting,
4M
accuracy (the higher
of):
+0.lo
or 20.28% of setting,
up
DSBSC peak envelope accuracy:
Same as amplitude accuracy,
Phase accuracy when
one
channel
is
used
to
modulate
channel A (sine wave):
20.15O or 30 ns, whichever is greater,
up to
20
kHz
modulation rate.
0.1
Hz
to
100
kHz
carrier frequency.
Supplemental Characteristics
VOR
bearing accuracy:
Typically
=0.059
AM
accuracy (at a
1
kHz
rate and
600
kHz
carrier):
FM accuracy (at a
1
kHz
rate,
20
kHz
deviation, and
600
kHz
carrier):
Typically
<
2
0.2%
of setting.
Pulse modulation level accuracy:
Typically
5%
up to
20
kHz
pulse rate.
DSBSC
carrier suppression:
Typically
>72
dB.
Intermodulation
(two
equal signal summed into one output):
Typically:
<-70
dBc, for frequencies up to
100
kHz.
Specifications for level accuracy, modulation accuracy, and
spectral purity are all referenced to the peak of the composite
signal less
3
dB. When signals are summed the specification for
each individual signal is degraded by its amplitude relative to the
peak
of
the composite signal.
FM
Stereo Mode (with Option
001)
Test signal modes:
Left
=
Right, Left
=
-Right, Left only, and
Test tone frequency range:
20
Hz
to 15
kHz.
Composite signal level:
up to
10
Vp-p
into 50Q.
Pilot tone level:
0%
to
100%
of composite level.
Pilot tone level resolution:
0.1%
of composite level.
Pilot tone frequency range:
0.1
Hz
to 600
kHz
Pilot tone phase adjustment range:
0.0
to 359.9O
Subcarrier frequency range:
0.1
Hz
to 600
kHz
Preemphasis:
25 psec, 50 psec, and 75 psec.
Typically
<t0.2%.
<-60
dBc, for frequencies
100
to
600
kHz.
Right only.
(default frequency 19
kHz).
(default frequency 38
kHz).
Supplemental Characteristics
FM stereo multiplex separation:
Multiplex subcarrier suppression:
typically
>
70
dB
Tone Sequence (with Option
001)
Number
of
different frequencies:
16
user definable tones
On-time duration:
0
ms,
0.80
ms to 655.35 ms.
Off-time duration:
0
ms,
0.80
ms to 655.35 ms.
zero on time not allowed)
Timing resolution:
0.01
ms
(10
ps).
Timing accuracy:
20.02
ms
(220
rs).
Sequence length
750 tones, user definable from front panel
L-R:
typically
>
65
dB, audio frequency
20
Hz to
15
kHz.
M-S:
typically
>
70
dB,
audio frequency
20
Hz to
15
kHz.
.
each with an individual on time and off time.
(Zero off time
or HP-IB programmable.
DTMF
sequence (with Option
001)
Number
of
tone pairs:
16 standard DTMF tone pairs (0-9,
A-D,
#,
*
).
Frequencies per Bell Technical Reference
Publication 48005.
On-time duration:
0
ms,
1.00
to 655.35 ms.
Off-time duration:
0
ms,
1.00
to 655.35 ms.
Timing resolution:
0.01
ms
(10
rs).
Timing accuracy:
2
1
ms.
Sequence length
750 DTMF tones, user definable from front
(Zero off time AND zero on time not allowed)
panel or HP-IB programmable.
1-4
rev.
01
NO
V89
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