User Manual

DRAFT RF Front End System Integration Manual
044-05082 Rev. A
2-8
March 2001
2-9.1 Responses from the MHUI
The MHUI responses always echo the received CMND byte as the ECHO byte of the response
packet. Amplifier base status is reported by setting the LEN field to 01H and reporting the follow-
ing bit mapped byte in the data field of the response packet for CMD==00h, 01h, 02h base status.
Table 2-9 Bit Mapped Byte in the Data Field fo Response Packet for
CMD==00h, 01h, 02h Base Status
Byte Specification
b0 1=High VSWR shutdown/0=normal
b1 1=High Temperature condition/0=normal
b2 1=Over-temperature shutdown/0=normal
b3 1=Partial Power supply fail at MHU/0=normal
b4 1=Fan fail at MHUI, if fan is implemented/0=normal
b5 1=Over Power shutdown/0=normal
b6 1=Fan ON/0=Fan OFF (if fan is implemented in the MHUI, else 0)
b7 1=Amplifier Enable/0=Amplifier Disabled
N
OTE
In case of RF overpower and high VSWR the shutdown condition will be alarmed
only after three unsuccessful attempts of self recovery.
Table 2-10 Bit Mapped Byte in the Data Field for Response Packet for
CMD==03H, 0DH, 0EH, 0FH, 10H or 11H Report Extended Status
Byte Specification
b0 1=partial failure HPA/0=normal
b1 1=partial failure LNA/0=normal
b2 1=total failure HPA/0=normal
b3 1=total failure LNA/0=normal
b4 1=Loss of communication between the MHUI and MHU/0=normal
b5 1=High VSWR warning (>3:1)/0=normal
b6 1=No TX input signal at MHUI/0=normal
b7 1=No TX input signal at MHU/0=normal
For CMD=04…0CH the data field contains the according value with the least significant bit at b0.
Depending on the length not used higher bits are filled with0.
Reply for command 0H4 (data field):
00H= -40 ºC, 1 ºC steps, 88H = +90 ºC
FEH< -40 ºC , FFH > +90 ºC
Reply for commands 05H, 06H and 7H (data field):
00H= -10 dBm, ¼ dB steps, FFH = 53 ¾ dBm