API Legacy AXS Operator's Manual page 23

situation regardless of program level. Once the Threshold level is set, the Attack time can be selected
to react faster than 100uS or slightly slower than 25mS to reduce false triggering. Although the Depth
control has a full range of -80dB, the scale is expanded in the first half of rotation so 0 to 9dB is
available for fine-tuning of subtle, undetectable gating. The second half of rotation is from 10 to 80dB
for more drastic noise reduction.
The Expander function uses a 1:2 ratio, allowing the signal to "sneak up" to the full signal level without
any loss of "under threshold" vocal or percussion nuances. Setting the threshold in the Gate function
to the desired level, then switching to the Expander mode is the perfect setup.
For special gating functions such as the famed "gated snare reverb", the Release function can be
switched to Hold, and the Release control becomes the Hold time. In both scenarios, the unselected
function has a set time of 100mS.
The 235 makes use of the 2510 and 2520 op-amps and therefore exhibits the reliability, long life, and
uniformity which are characteristic of all API products.
The controls for the 235 Noise Gate/Expander function as follows:
IN (in/out switch): Activates the module
Illuminates when engaged
•
THRESH (Threshold): Sets the activation threshold
Variable from +25 to -45dB.
•
DEPTH: Sets the amount of attenuation (gain reduction) from 0 to -80dB. Although the Depth control
has a full range of -80dB, the scale is expanded in the first half of rotation so 0 to 9 dB is available for
fine-tuning of subtle, undetectable gating. The second half of rotation is from 10 to 80dB for more
drastic noise reduction.
AT (Attack): Selects attack time. Once the Threshold level is set, the Attack time can be selected to
react faster than 100 micro seconds or slightly slower than 25 milliseconds to reduce false triggering.
F: Fast (less than 100 microseconds)
M: Medium (25ms)
R/H (Release/Hold) Time: Sets release or hold time
50ms to 3 seconds
The Release or Hold function is determined by the HLD/REL switch
HLD/REL (Hold/Release): The Release function can be switched to Hold, and the Release control
becomes the Hold time. In both functions, the unselected one has a set time of 100ms.
HLD (Hold): The R/H control determines Hold time (Release is set to 100ms)
REL (Release): The R/H control determines Release time (Hold is set to 100ms)
EXP/GTE (Expander/Gate): Selects the Expander or Gate function
EXP (Expander): Sets the ratio to 1:2
GTE (Gate): Sets the gate function
-dB (Gain-reduction Meter): LED meter indicates the amount of gain reduction
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