Arbiter Systems 1073A, Руководство по эксплуатации

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3.4 Jumper Configuration 11
signals up to 5 MHz, if the input level is 0 to 5 volts and CMOS-compatible. For AC-coupled
inputs, the nominal operating level of the input circuit is 0 to +15 dBm (0.6 to 5 Vpp).
3.4.2 Input Bussing
An input signal applied to Channel A, in addition to driving the four Channel A outputs, may also
drive the Channel B and/or Channel C outputs. Likewise, an input signal applied to Channel B
may also drive the Channel C outputs. For bussing, set channel jumpers according to the “Buss
Selected” column shown in Tables 3.2 and 3.3. Use “Independently Selected” column in these tables
to set each channel jumper so that each channel operates independently.
JMP8 Position JMP9 Position Independently Selected Buss Selected
A A DC coupled –
B A AC coupled –
A or B B – Channel A as Input
Table 3.2: Channel B Input Selection Guide
Table 3.2 indicates how to select Channel A signal as input to Channel B outputs; set jumper
JMP9 to the ‘B’ position. The positions of jumpers JMP7 and JMP8 have no effect on bussing
operation. As the table indicates, jumper JMP8 does not affect Channel A bussing selection.
JMP15 Position JMP16 Position Independently Selected Buss Selected
A A DC coupled –
B A AC coupled –
A B – Channel A as Input
B B – Channel B as Input
Table 3.3: Channel C Input Selection Guide
Table 3.3 indicates how to select the Channel A signal as input to Channel B and C outputs;
set JMP15 to the ‘A’ position and JMP16 to the ‘B’ position. The position of JMP14 has no effect
on bussing operation. Leave jumper JMP9 in the ‘A’ position to bypass Channel B.
Table 3.3 also indicates how to select the Channel B signal as input Channel C outputs; set
JMP15 to the ‘B’ position and JMP16 to the ‘B’ position. The position of JMP14 has no effect on
bussing operation.
3.4.3 Input Characteristics
AC-coupled mode is intended for use with signal frequencies of 100 kHz and above. In AC-coupled
mode, the approximate input impedance of the Model 1073A is 100 ohms, isolating the input
transformer. AC-coupled inputs may be driven with sine or square waves having levels of 0 to +15
dBm, or 0.2 Vrms to 1.2 Vrms from a 50-ohm source. For a low-impedance source, use input levels