Telex ISP-100 manual Combine, Input Attenuators, Using the Knob, Using the Text Box

8-2

Combine

Figure 8-12-to-1 combine component.

The Combine component (see Figure 8-1) adds multiple input signals together and sends the sum to a single output. In QuickMAPs, 2-to-1,

3-to-1, and 4-to-1 combines may exist. The combine’s default attenuation is set so that the combine’s output level is unity. In every case the attenuation applied to each input channel may be independently adjusted between -96 dB and 0 dB, or muted, and the polarity applied to each input channel may be independently set to + or - (in-phase or out-of- phase). Attenuation and polarity are applied to the input signals before they are added to the combination.

Bypassing a combine sets all attenuations to 0 dB and all polarities to + (in-phase).

Input Attenuators

The input attenuators can be adjusted three ways:

Using the Knob

Click on the indicator on the knob and while continuing to hold down the mouse button, move the mouse in an arc. The numbers in the box below the knob will change. When the desired level is reached, release the mouse button.

Using the Text Box

Click in the box. Using the Back Space and/or Delete keys erases the current entry and enters the new level. Be sure to press the Enter key after the entry is made. Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted. Alternatively, click and drag across the number in the box to highlight the number in it. Type the new setting and press the Enter key when finished.

Using the UP/DOWN Arrows

To increase the level, click on the up arrow. To decrease the level attenuation, click on the down arrow. The amount of increase or decrease is controlled by the fine/coarse control.

10 July 1998