diff --git a/DSView/pv/data/dsosnapshot.cpp b/DSView/pv/data/dsosnapshot.cpp
index 71120de5..3186d4fa 100644
--- a/DSView/pv/data/dsosnapshot.cpp
+++ b/DSView/pv/data/dsosnapshot.cpp
@@ -51,6 +51,7 @@ DsoSnapshot::DsoSnapshot() :
     _threshold = 0;
     _measure_voltage_factor1 = 0;
     _measure_voltage_factor2 = 0;
+    _is_file = false;
 
 	memset(_envelope_levels, 0, sizeof(_envelope_levels));
 }
@@ -83,7 +84,8 @@ void DsoSnapshot::init_all()
     _ring_sample_count = 0;
     _memory_failed = false;
     _last_ended = true;
-    _envelope_done = false;    
+    _envelope_done = false;   
+    _is_file = false; 
 
     for (unsigned int i = 0; i < _channel_num; i++) {
         for (unsigned int level = 0; level < ScaleStepCount; level++) {
@@ -122,6 +124,7 @@ void DsoSnapshot::first_payload(const sr_datafeed_dso &dso, uint64_t total_sampl
 
     bool channel_changed = false;
     uint16_t channel_num = 0;
+    _is_file = isFile;
 
     for (const GSList *l = channels; l; l = l->next) {
         sr_channel *const probe = (sr_channel*)l->data;
diff --git a/DSView/pv/data/dsosnapshot.h b/DSView/pv/data/dsosnapshot.h
index 724f023a..01955321 100644
--- a/DSView/pv/data/dsosnapshot.h
+++ b/DSView/pv/data/dsosnapshot.h
@@ -127,6 +127,10 @@ public:
         return index == 0 ? _data_scale1 : _data_scale2;
     }
 
+    inline bool is_file(){
+        return _is_file;
+    }
+
 private:
     void append_data(void *data, uint64_t samples, bool instant);
     void free_envelop();
@@ -146,6 +150,7 @@ private:
     uint64_t _measure_voltage_factor2;
     float _data_scale1 = 0;
     float _data_scale2 = 0;
+    bool    _is_file;
  
     friend class DsoSnapshotTest::Basic;
 };
diff --git a/DSView/pv/view/dsosignal.cpp b/DSView/pv/view/dsosignal.cpp
index b67004ef..1ac02efc 100644
--- a/DSView/pv/view/dsosignal.cpp
+++ b/DSView/pv/view/dsosignal.cpp
@@ -830,9 +830,14 @@ void DsoSignal::paint_mid(QPainter &p, int left, int right, QColor fore, QColor
                 const uint32_t count  = (index == 0) ? status.ch0_cyc_cnt : status.ch1_cyc_cnt;
                 const bool plevel = (index == 0) ? status.ch0_plevel : status.ch1_plevel;
                 const bool startXORend = (index == 0) ? (status.ch0_cyc_llen == 0) : (status.ch1_cyc_llen == 0);
-                const uint16_t total_channels = g_slist_length(session->get_device()->get_channels());
+                uint16_t total_channels = g_slist_length(session->get_device()->get_channels());
+
+                if (total_channels == 1 && _data->is_file()){
+                    total_channels++;
+                }
+                
                 const double tfactor = (total_channels / enabled_channels) * SR_GHZ(1) * 1.0 / samplerate;
-  
+ 
                 double samples = (index == 0) ? status.ch0_cyc_tlen : status.ch1_cyc_tlen;
                 _period = ((count == 0) ? 0 : samples / count) * tfactor;