Introduction | Details | Specifications |
Manuals
AC MAINS
| Input Power: |
22VA, 115 VAC |
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| Operating Range: |
108-122/216-244 VAC, 50/60 Hz |
INPUTS
| Analog: |
Nominal input level (APL):
-24 dBu, minimum
Impedance:
600 Ohms as shipped, balanced
30K (internal option), balanced
Connectors:
XL-3 Female
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| Digital: |
Format:
AES3-id, transformer coupled
Sample rate:
32-48 KSPS (auto sample rate converter)
Word length:
24 bit max (internal I2S)
Connector:
BNC
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Selection:
Valid digital input is taken. Invalid or no digital input takes analog input.
An internal jumper can force analog selection.
OUTPUTS
| Analog |
Nominal output level (peak, with control):
+10 dBu, +10 dBm/600 Ohms
Maximum output level (peak):
+18 dBu, +18 dBm/600 Ohms
Adjustment range:
20 dB
Source impedance:
<50 Ohms, balanced & floating
Connectors:
XL-3 Male
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| Digital: |
Format:
AES3-id, transformer coupled
Sample rate:
48 KSPS
Word length:
24 bit
Connector:
BNC
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GAIN CONTROL
| Overall static gain (ctl
off): |
Analog:
Adjustable
Digital:
10.6 dB
Processing gain with respect to static gain:
+10 dB
max
-10 dB min indicated
approx -20dB possible
Assumed digital APL:
-16.4 dBFS on input
Range of threshhold adjustment:
3dB |
ADAPTIVE PRE-EMPHASIS CONTROL
(This is an internally jumper selected control option.)
| Time constant: |
75 microseconds |
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| Inflection frequency of control: |
Variable |
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| Range of threshold adjustment: |
0-6dB above wideband |
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FIXED
OUTPUT DE-EMPHASIS
(This is an internally jumper
selected option.) |
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| Time constant: |
75 microseconds |
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| METER
INDICATIONS |
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| Input: |
L only with 10dB peak marker
R only with 10dB peak marker
L&R together |
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| Output: |
L only with +10dBu marker
R only with +10dBu marker
L&R together |
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| Level matching: |
Log peak of Input (L-R)
Log peak of Output (L-R) |
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| Wideband AGC: |
Operating gain over range of
+10 to —10 dB |
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| Adaptive pre-emphasis (HFL): |
High frequency gain (15kHz)
From 0dB to approx —17 dB |
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| Messages: |
HFL not enabled
Digital input selected
Pre-emphasis enabled |
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| Alarm: |
Input polarity reversed |
MECHANICAL
| Mounting |
EIA 19" rack, 1U high |
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| Depth |
16"(406mm) plus connectors |
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| Weight |
Approx 6 kg (13 lbs) |
ELECTRICAL PERFORMANCE
Frequency Response
| Digital input
to Analog or digital output: |
+/-0.5dB, 30Hz-14kHz |
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| Analog input to Analog or Digital
output: |
+/-0.5dB, 50Hz-14kHz |
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| Analog input high-pass filter: |
-3dB at 30 z/18dB/oct
(The HPF can be bypassed) |
Notes: The unit incorporates a 15.7kHz notch
filter and BTSC system alias protection LPF. These filters
are always present in both the analog and digital input paths
The same tolerance is met when the HFL is engaged along with the fixed output
de-emphasis option, with control off. With control on, the input level must
be reduced below the HFL theshhold, in which case the tolerance is also met.
With HFL engaged and no output de-emphasis, the 75usec pre-emphasis is accurate
to a smaller tolerance (typically +/-0.2 dB), with control off or at level
below HFL threshold.
(THD+noise): Either input
to Digital output at -1dBFS <0.1%,
30Hz-14kHz
Either input to Analog output at +10dBu <0.1%, 30Hz-14kHz
Crosstalk: Analog inputs to either outputs >50dB, <10kHz
Digital inputs to either outputs >55dB, <10kHz
Output noise: Either inputs to Digital out -83dBFS
Either inputs to Analog out -72dBu
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