Anritsu MT1810A - Input Level

Chapter 6 Performance Test
6-6
6.3.2 Input level
(1) Specifications
Table 6.3.2-1 Specifications
Option Specifications
MP1862A
Data Input
XData Input
Input amplitude: 0.125 to 1.0 Vp-p
Threshold voltage: –3.5 to +3.3 V
(2) Connection
Refer to Figs. 6.3.1-1 for the connections.
(3) Procedure
1. Connect devices and configure the settings in the same manner
as shown in Steps 2 and 3 in Section 6.3.1.
2. Set the output level of MP1861A and threshold voltage of
MP1862A as shown in Table 6.3.2-2, turn on the MP1861A
output, and then press the
Start
key on the front panel of
MP1800A.
Adjust the phase as required to make sure that there is no bit
error.
Table 6.3.2-2 Input level test setting when MP1862A is installed
No.
MP1821A MP1862A
Termination
Amplitude
[Vp-p]
Offset (Vth)
[V]
Termination
Threshold voltage
[V]
1
GND
1.0
–2.500
GND
–2.500
2
0.25*
–1.127
–1.127
3
0.25*
+1.528
+1.528
4
1.0
+2.800
+2.800
*: To output the signal with an amplitude of 0.25 Vp-p, use the 41V-6
precision fixed attenuator 6 dB (standard accessory) with MP1861A
set to 0.5 Vp-p.
Note:
To change the termination conditions, be sure to set MP1861A and
MP1862A in the procedure below. Unless the termination
conditions are changed to the same values in the following
procedure, both of MP1861A and MP1862A may be damaged.
(1) Turn off the MP1861A output.
(2) Set the termination condition of MP1862A to GND.
(3) Change the termination conditions of MP1861A.
(4) Set the termination conditions of MP1862A to be the same
as MP1861A.