B2=2 PREPARATIONS FOR SOUNDING 
Table B2-1. Minimum Voltage Requirements 
Radiosonde Type 
WB, 1680 MHz conventional 
WB, 1680 MHz transponder 
WB, 1680 MHz hypsometer 
WB, 1680 MHz transponder- 
hypsometer 
WB, 403 MHz conventional 
WB, 403 MHz pulsed 
AF, AN/AMT - 12A 
AF, 1680 MHz transponder 
AF, AN/AMQ - 9 
N, 1680 MHz 
N, 403 MHz 
GH Ch Cy Co CG Gi SG SO 
Oo Co Cy Ch FS So Ci Cr 
N, 1680 MHz transponder 
smoke, steam or heats excessively, there is a short between the sec- 
tions and it should be rejected. 
2.3 Installation of Antenna or Transmitter. Install the antenna or 
transmitter in accordance with instructions issued for the type and series 
of radiosonde in use. The transmitting antenna or transmitter should be 
installed in the radiosonde before connecting the battery to avoid dam- 
aging the transmitter circuit. This does not apply to the wire flight 
antenna for transponder radiosondes, which is installed after the base- 
line-check and prior to making the pre-release range setting. 
2.4 Installation of Battery. Install the battery in the radiosonde in 
accordance with instructions issued for the type and series of radio- 
sonde in use. Extreme care should be taken when inserting the battery 
plug into the battery socket. The instrument may be damaged if a low 
IL Ih= Of) FMH#3 
