Quectel LC29H Series

GNSS Module Series
LC29H_Series_EVB_User_Guide 31 / 38
8.3. V_BCKP Power Consumption Measurement
Before measuring the V_BCKP power consumption, you must connect the components to EVB to ensure
that the module can communicate and fix normally. See Chapter 4.1 Testing via QGNSS.
Detailed steps for measuring V_BCKP power consumption with an ammeter:
Step 1: Switch off the power supply (S201) and pull out the V_BACK jumper cap (J202). Connect the
ammeter in series to both pins of J202, as shown below.
Step 2: Switch on the power supply (S201) and read the ammeter.
Ammeter
Figure 17: V_BCKP Power Consumption Measured with Ammeter
Detailed steps for measuring V_BCKP power consumption with a power consumption meter:
Step 1: Switch off the power supply (S201) and pull out the V_BACK jumper cap (J202). Then, ensure
the positive pole of the power consumption meter is connected to pin 1 (with arrow silkscreen) of
J202, and the negative pole is connected to GND.
Step 2: Switch on the power supply (S201) and read the power consumption meter.